Necrotic Plague [Magic 2011] DYN200 if you prefer

if you prefer

put a +1/+1 counter on Kavu Monarch

Disguise {3}{G}

Set: Kaladesh Type: Enchantment Rarity: Uncommon Cost: {1}{B} Whenever an artifact enters the battlefield under your control

You get an emblem with "You may cast spells from your hand without paying their mana costs

Necrotic Plague [Magic 2011] DYN200 if you preferSet: Magic 2011 Type: Enchantment Aura Rarity: Rare Cost: {2}{B}{B} Enchant creature Enchanted creature has "At the beginning of your upkeep, sacrifice this creature." When enchanted creature dies, its controller chooses target creature one of their opponents controls. Return Necrotic Plague from its owner's graveyard to the battlefield attached to that creature.