Walrein

Ability · Gather Ice

Once during your turn (before your attack), when you play Walrein from your hand to evolve 1 of your Pokémon, you may attach as many [W] Energy cards from your hand to Walrein as you like.

W · W · C · C

Discard an Energy card attached to Walrein and then discard an Energy card attached to the Defending Pokémon.

Weakness: Metal · Resistance: none · Retreat: 4