History ThatOneBoss / FateGrandOrder

* The Merman General in the one-time only quest "Seafloor Myths" has a ''very nasty'' tendency to activate his skill which grants him an instant NP bar, and if he unleashes his Extra Attack, it removes all buffs from his target (thankfully ''after'' dealing damage). While it's only single target, the Merman General spamming it means that unless if he's stunned, Skill or NP sealed, he will likely use it ''two times in a single turn''. Making things worse is that he, alongside the Shark Pirates are protected by Hermit Crabs, which not only grant the Merman General and Shark Pirates massive damage resistance, the Hermit Crabs themselves are incredibly tanky, and the Shark Pirates high crit chance and damage means that sending a Berserker isn't an option, making Tlaloc the only Servant capable of resisting their onslaught [[note]]The other candidates, Oberon, has a Sleep-inducing NP, but also grants his opponents Invincibility, and Nine-Tattoo Dragon Eliza has no NP charge to compliment her Buster NP[[/note]]. The Merman General thankfully stops spamming his NP Charge skill after his first HP bar breaks, but trades it off with the ability to seal [=NPs=], and gets another skill that allows him to increase his attack and pierce Invincibility, making for an extremely hard fight. And to make matters worse, his fight alongside others is the only way to get Stellar Sand and Torches of Nova to release various nodes in the Class Score.

** Loving Gaze Enshrined Deity Succunnos has a lot of annoying gimmicks. The first is that it has Bias Disaster, which not only increases defense against enemies with debuffs, but also removes the recent 3 buffs applied to the entire party unless Buff Removal Immunity is applied. The second is that much like [[spoiler:Camazotz]] above, it has a buff that stuns a random servant when they use a skill (including Master Skills) called Gaze of Sharing Refusal. They also have an occasional skill that debuffs a party member with an NP and Skill Seal. Most damningly, upon its first Bar Break, it applies a 5-turn NP drain debuff and an unremovable ''Debuff Removal Success Rate Down'' debuff, on top of now having a regenerating Gaze of Sharing Refusal buff, which cripples debuff cleansers such as Altria Caster. And if it's allowed to unleash its Extra Attack, it inflicts massive damage and reduces the party's NP gauge and applies a Buff Block to them, which when combined with the aforementioned Debuff Removal Success Rate Down debuff, can potentially shut down the entire front row. Oh, and you're forced to use Altria Caster (Berserker) against it, which is a problem because she's an Berserker, and she's also dead weight because the boss happens to be a Foreigner who ''resists'' Berserkers. The rematch against it is the same, but you have a lot more freedom on who to choose.

** The final battle against [[spoiler:Fairy Knight Lancelot (not including her Albion form)]]. Imagine [[SpamAttack Mordred's gimmick]] in Camelot, except with break bars, a single target NP, Forced story servants & no master skills or command seals. Upon 1st break, she applies a sure hit to herself to hit through evasion. Upon 2nd break, she also applies Invulnerability to herself for 1 turn. All this, on top of dealing with her onslaught of subsequently stronger Noble Phantasms and almost guaranteed crits, devolves the fight into a Damage Race blitz at the eleventh hour. The only upside in your favor is her typing as a Lancer, and the fact she has the [[spoiler:Demonic Beast and Dragon traits, meaning Sabers like Rama and Sigurd can greatly help]], but you still have to contend with her ability to practically one-shot you every turn.

* Nero Fest's Exhibition battle with First Hassan. Even before the quest released for North America, this fight was already reckoned as difficult, poorly-designed, random, and frustrating on other servers, given First Hassan has a boosted chance to inflict Instant Death with all attacks, making his Noble Phantasm a virtually certain death sentence even through Invulnerability or Evade, and starts the fight with twenty stacks of potent Special Defense that he slowly removes, one at a time, by decapitating his endless streams of teammates at the start of each turn, gaining powerful buffs with each decapitation, and with harder-to-kill teammates granting more-dangerous boosts and being prioritized for his decapitations. But, at the start of each turn, he would plant a single-hit Target Focus on the first servant in line. While this still made the fight very-random (he sometimes leads off by using one of his skills instead of attacking, meaning that the target can be dispelled by one of his teammates instead, and if he decapitates a teammate he'll get to act twice in a round), players could still prevent his rapidly-charging Noble Phantasm from hitting anyone else in the party on turns it was destined to go off (and not only does he not decapitate one of his teammates if he starts the round with a full charge bar, but the hardest-to-kill enemy gives him a beefy attack boost and a free point of bar) and ensure that the NP hit a servant like a friendly First Hassan or BB who was either immune or supremely resistant to Instant Death, respectively. The fight was still long, frustrating, random, and deserved an entry here, but there were multiple strategies for managing it... until it first released on the North American server. Now, the First Hassan applies Target Focus to a ''random'' teammate at the start of each turn, making the mechanic as a whole pointless and agonizing. The only remaining viable strategies are to stack a team with Irisviel, an Event servant many later players won't have access to whose Noble Phantasm applies team-wide Guts, and some of the toughest, and rarest, defensive supports possible, and/or abusing Order Change and stacking the most powerful possible buffs on a small selection or rare offensive servants (Sanzang, Illya, Hijikata, etc.) to burn him down after his protection weakens... and even these are {{Luck Based Mission}}s par excellence, requiring lots of extremely-random factors to align perfectly and with countless chances for something to go wrong throughout, given First Hassan's heavy damage potential and chance to inflict Instant Death at random on any lucky hit, Irisviel's well-known issue of having very, very low NP gain, and the, again, low availability of many servants involved. Thankfully, the Grand Nero Fest rerun of this fight on NA restored the fixed targeting, and even at its worst, the fight was optional.

* Nero Fest's Exhibition battle with First Hassan. Even before the quest released for North America, this fight was already reckoned as difficult, poorly-designed, random, and frustrating on other servers, given First Hassan has a boosted chance to inflict Instant Death with all attacks, making his Noble Phantasm a virtually certain death sentence even through Invulnerability or Evade, and starts the fight with twenty stacks of potent Special Defense that he slowly removes, one at a time, by decapitating his endless streams of teammates at the start of each turn, gaining powerful buffs with each decapitation, and with harder-to-kill teammates granting more-dangerous boosts and being prioritized for his decapitations. But, at the start of each turn, he would plant a single-hit Target Focus on the first servant in line. While this still made the fight very-random (he sometimes leads off by using one of his skills instead of attacking, meaning that the target can be dispelled by one of his teammates instead, and if he decapitates a teammate he'll get to act twice in a round), players could still prevent his rapidly-charging Noble Phantasm from hitting anyone else in the party on turns it was destined to go off (and not only does he not decapitate one of his teammates if he starts the round with a full charge bar, but the hardest-to-kill enemy gives him a beefy attack boost and a free point of bar) and ensure that the NP hit a servant like a friendly First Hassan or BB who was either immune or supremely resistant to Instant Death, respectively. The fight was still long, frustrating, random, and deserved an entry here, but there were multiple strategies for managing it... until it released on the North American server. Now, the First Hassan applies Target Focus to a ''random'' teammate at the start of each turn, making the mechanic as a whole pointless and agonizing. The only remaining viable strategies are to stack a team with Irisviel, an Event servant many later players won't have access to whose Noble Phantasm applies team-wide Guts, and some of the toughest, and rarest, defensive supports possible, and/or abusing Order Change and stacking the most powerful possible buffs on a small selection or rare offensive servants (Sanzang, Illya, Hijikata, etc.) to burn him down after his protection weakens... and even these are {{Luck Based Mission}}s par excellence, requiring lots of extremely-random factors to align perfectly and with countless chances for something to go wrong throughout, given First Hassan's heavy damage potential and chance to inflict Instant Death at random on any lucky hit, Irisviel's well-known issue of having very, very low NP gain, and the, again, low availability of many servants involved. At least he's optional.

[[quoteright:1000:https://static.tvtropes.org/pmwiki/pub/images/screenshot_2023_07_30_145635.png]]
[[caption-width-right:1000:You are faced with overwhelming power. Accept your helplessness.[[labelnote:Note]] Don't worry this is just a HopelessBossFight, although you'll still have to fight him later on and it's far even worse than you think.[[/labelnote]]]]

Given to the long running mobile game of the Fate franchise, these bosses will absolutely tear you apart if you don't plan carefully.

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* Gao Changgong is surprisingly difficult to fight against here, not only is he now a Rider who chews your support Casters like paper, but he got passive Critical chance buff by default, immune to charm or stun altogether, and his damage output only increases every time you break his HP bar (the last also adds Ignore Defense to his attacks), meaning that not even Assassins are safe from him. What's more, [[spoiler:Zouken]] will launch [[spoiler:"Transport Department Bombs"]] on your team time to time, and each deals 4000 to 5000 damage ''per servant'', which can actually take down severely wounded servants. You're supposed to put him down ASAP with Assassins, but that's after your team withstands his onslaught.

[[caption-width-right:1000:You are faced with overwhelming power. Accept your helplessness.[[labelnote:Explanation]] Don't worry this is just a HopelessBossFight, although you'll still have to fight him later on and it's far even worse than you think.[[/labelnote]]]]

Given to the long running mobile game of the Fate franchise, there's no doubt that these bosses will absolutely tear you out if you don't plan carefully.

[[caption-width-right:1000:You are faced with overwhelming power. Accept your helplessness.[[labelnote:Explanation]] Don't worry this is just a HopelessBossFight, although you'll still fight him later on.[[/labelnote]]]]

[[caption-width-right:1000:You are faced with overwhelming power. Accept your helplessness.]]