Pikachu

Haste
Electric (when this creature deals damage to another creature, flip a coin: Heads, that creature can’t attack on its owner's next attack phase. Tails, draw a card and discard a card.)

{t}: Pikachu deals 1 damage to target creature.

Whenever you cast an instant or a sorcery spell, untap Pikachu.

Evolve - Sacrifice an artifact named Thunder Stone. Transform this creature.