Powerleech [Antiquities] XY171 except it's a 4/4 black

except it's a 4/4 black Zombie Cat with no mana cost

Set: Mercadian Masques Type: Instant Rarity: Rare Cost: {3}{W} You may exile a white card from your hand rather than pay this spell's mana cost

and what to do when either goes wrong

Set: Unhinged Type: Creature — Donkey Zombie Rarity: Common Cost: {2}{B}{B} {1}{B}

even in the endless flat plains of their homeland

Powerleech [Antiquities] XY171 except it's a 4/4 blackSet: Antiquities Type: Enchantment Rarity: Uncommon Cost: {G}{G} Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without {T} in its activation cost, you gain 1 life. The Forest of Argoth has developed a resistance to mechanical intrusion.