So the first thing we need to do is give control of Dralnu to our unfortunate victim
Then, when they enter the battlefield, either each other Creature gets -X/-X until the end of turn, and you lose X life, or you can return up to X Creature cards with a mana value of X or less from your graveyard to the battlefield, and then give them haste until the end of turn
Illustrated by Ciruelo Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
A single green mana to activate this ability is nothing, too, so this has the potential to go up if enough EDH players want to cheat stuff in
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