Appa, Steadfast Guardian 10 (Avatar: The Last Airbender) - Foil Condition:DMG You may also use this

You may also use this Ability if this Pokemon is in the Active Spot and is Knocked Out by damage from an attack from your opponent's Pokemon

If a land or Bird you control entering the battlefield causes a triggered ability of a permanent you control to trigger

reveal them

Each other Warrior creature you control enters with an additional +1/+1 counter on it

Appa, Steadfast Guardian 10 (Avatar: The Last Airbender) - Foil Condition:DMG You may also use thisFlash Flying When Appa enters, airbend any number of other target nonland permanents you control. (Exile them. While each one is exiled, its owner may cast it for {2} rather than its mana cost.) Whenever you cast a spell from exile, create a 1 1 white Ally creature token.