They often do this by destroying all creatures, as we see in Wrath of God, but total destruction isn't the only way wraths wipe the board
You can quest with him and return a Merlin, Goat back to your hand, giving you four lore instantly, and allowing you to play the Goat again to immediately gain one more, and another when the Goat leaves play
3 Cloud, Midgar Mercenary Wield The Buster Blade, And The Colossus Hammer, And The Sword Of Hearth And Home, And The Helm Of The Host
Likewise, Faith and Bravery could determine the outcomes of a lot of abilities as well as the strength of them, but their appearance in later games were changed to be a status buff that boosted physical and magical strength instead