Very Cryptic Command (Untap) [Unstable] Human Samurai Zulaport Enforcer can't be blocked

Zulaport Enforcer can't be blocked except by black creatures

When enchanted creature is dealt damage

Set: Magic 2015 Type: Creature — Zombie Giant Rarity: Uncommon Cost: {4}{B} Nightfire Giant gets +1/+1 as long as you control a Mountain

" —Grenadier motto

you may return target creature you control to its owner's hand

Very Cryptic Command (Untap) [Unstable] Human Samurai Zulaport Enforcer can't be blockedSet: Unstable Type: Instant Rarity: Rare Cost: {1}{U}{U}{U} Choose two Untap two target permanents. Tap each permanent target player controls with exactly one word in its name. Discard all the cards in your hand, then draw that many cards. Return target instant or sorcery card from your graveyard to your hand.