Pikachu, Stormbound Rodent

Pikachu, Stormbound Rodent enters the battlefield tapped

When Pikachu, Stormbound Rodent enters the battlefield you may pay {2} and deal 4 damage to any target

Pay {4} Evolve-If you do search your graveyard, deck, or hand for Raichu Thunderbound Vermin and return it to the battlefield tapped, then shuffle your deck and sacrifice this card