Sakashima's Student [LIST - 024/156] 500-years-in-the-future Rules Text Contains: When Terra

Rules Text Contains: When Terra enters

With a deep chill to rival the heat

Card Text: Mythical Treasures Await

and you have another "Anniversary" or "Poppin'Party" character

If there are any Darkness Energy cards attached to Dark Houndoom

Sakashima's Student [LIST - 024/156] 500-years-in-the-future Rules Text Contains: When TerraRarity: R #: 024 156 Creature Type or Sub Type: Creature Human Ninja P: 0 T: 0 Rules Text Contains: Ninjutsu 1U (1U, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) You may have Sakashima's Student enter the battlefield as a copy of any creature on the battlefield, except it's a Ninja in addition to its other creature types.