Trying to approximate the effects of an EX Overskill here. Any of them.
Name: Ultima
Ability: Collected energy strongly empowers the Weapon, increasing all of its capabilities for up to 30 seconds. The effects of Ultima are increased if the Player's other Weapons have limited-use abilities remaining. Ultima can only be used once per battle; when Ultima is used, no other limited-use abilities may be used for the remainder of the battle.
>Suggest an ability
Name: Ultima
Ability: Collected energy strongly empowers the Weapon, increasing all of its capabilities for up to 30 seconds. The effects of Ultima are increased if the Player's other Weapons have limited-use abilities remaining. Ultima can only be used once per battle; when Ultima is used, no other limited-use abilities may be used for the remainder of the battle.