Faunsbane Troll

Auras that pump a creature are usually pure card disadvantage in the removal-fodder sense: you spend a card to buff a body, and the buff evaporates the moment the body dies. This one turns the enchantment into ammunition. The Monster Role arrives free, spun off when the troll lands (so a countered creature spell never makes one), then the sacrifice cost eats it to fuel a fight. Because feeding the Aura is an activation cost, the token comes off before the ability resolves: the buff is spent to pay for the fight, not to win it, so this swings into combat as a 4/4 with the Role already gone. That is the trade the card is built around. The exile rider is what separates it from a repeatable Prey Upon. It replaces death with exile, so it strands recursion and denies death triggers, cleaning up graveyard-value creatures and anything that would rather die on its owner's terms than sit in exile (though it does nothing to a creature that lethal damage cannot kill in the first place). The leash is real: sorcery-speed only, so it can never ambush an attacker, and once the free Role is consumed the ability sits idle until you feed it another enchantment. That single restriction pushes the shell toward Auras and Role generators, since keeping the fight online becomes a deckbuilding cost rather than a free repeat. The result is a green-black removal engine wearing a beater's body, where the enchantment is not a stat bump but the trigger it is loaded to fire.