T:Mode$ DamageDealtOnce | CombatDamage$ True | ValidSource$ Card.Self | ValidTarget$ Creature.blocking | TriggerZones$ Battlefield | Execute$ TrigManifest | TriggerDescription$ Whenever CARDNAME deals combat damage to one or more blocking creatures, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
Oracle:Whenever Arashin War Beast deals combat damage to one or more blocking creatures, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)