Nikartana, the Mangler

Deathtouch, Skulk
Whenever Nikartana attacks and isn't blocked, you may have it deal 1 damage to each of up to two target nonlegendary, nontoken creatures.
Whenever Nikartana blocks, if you control Nikartana after combat, you may tap two target nonland permanents. They don't untap during their controller's untap step.