YMMV / Monster Hunter Frontier

• Game-Breaker: An extreme Lance player with Zenith Guard Boost can pretty much guard any attack in the game from the front and from behind, take no damage or stamina loss, and reflect half of the weapon damage back unto the monster. What's more, every two blocks it applies a mega potion to every member of the team. As shown in this playthrough by Rage Gaming Videos, this includes the beam attack of White Fatalis. Said beam does 500 individual ticks of damage, which meant that the block shown reflected a majority of those ticks back unto the monster.