Wartortle

Ward {2}
Evolve—Squirtle (You may sacrifice a creature you control whose card name includes the word Squirtle as you cast this spell. Reduce this spell's casting cost by the sacrificed creature's converted mana cost.)
Wartortle gains +0/+2 as long as it's tapped.
{u}, {t}: Tap target creature, it doesn't untap during
its controller's next untap step.