Thrull Retainer is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
Enchant creature Enchanted creature gets +1/+1. Sacrifice this Aura: Regenerate enchanted creature.
Complete guide
Thrull Retainer is a classic black Aura that offers both an offensive boost and a safety net for your most important creatures. This one-mana enchantment provides a permanent +1/+1 buff while standing ready to sacrifice itself to protect its host from death. Understanding the timing of its regeneration ability is key to mastering this card's defensive potential.
A Shield of Flesh and Bone
Thrull Retainer serves two roles: a combat enhancer and a one-time insurance policy. As long as it is attached to a creature, that creature gains a +1/+1 bonus. At any point you could pay its activation cost—which in this case is simply sacrificing Thrull Retainer—you create a regeneration shield. This shield means the next time the creature would be destroyed this turn, it instead taps, is removed from combat, and all damage is marked off it.
The Timing of Sacrifice
A critical detail involves the sequence of activation. Because sacrificing Thrull Retainer is the cost of the ability, the Aura leaves the battlefield and goes to the graveyard immediately when you put the ability on the stack. This means the creature loses the +1/+1 bonus before the regeneration shield is actually created. If the creature has lethal damage marked on it that equals its toughness without the bonus, it may die before the ability resolves.
When to Retain Control
You should generally wait to use the sacrifice ability until a destruction effect or lethal damage is actually targeting your creature. Since the shield lasts until the end of the turn, you can activate it in response to a board wipe or a combat trick. However, remember that regeneration only replaces destruction; it does not stop effects that reduce toughness to zero or effects that exile the creature.
Interaction examples
If you have a 2/2 creature enchanted by Thrull Retainer, it is currently a 3/3. If an opponent casts a spell to destroy it, you can sacrifice Thrull Retainer in response. The creature immediately becomes a 2/2 again. Once the ability resolves, the 2/2 creature gains a regeneration shield. When the opponent's spell tries to resolve, the shield is consumed, and your 2/2 survives.
Animate DeadIf you use Animate Dead to bring back a creature and then enchant that creature with Thrull Retainer, you have two layers of protection. If the creature is targeted by a 'destroy' effect, you can sacrifice Thrull Retainer to save it. Because Thrull Retainer is the only thing leaving the battlefield, Animate Dead remains attached, and the creature stays under your control.
Urza's SagaYou can use Urza's Saga to create a large Construct token. Enchanting this token with Thrull Retainer makes it even larger. If an opponent attempts to destroy the Construct, you can sacrifice the Retainer to save your massive artifact creature. Even though the Retainer isn't an artifact, it ensures your high-value Construct stays on the board to benefit from your other artifacts.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Thrull Retainer
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
This leaves the battlefield when you activate its activated ability, but the enchanted creature won't be regenerated until the ability resolves. In the intervening time, the creature will no longer have the bonus that this had been giving it. This may cause the creature to be destroyed before the regeneration shield is created.
No other card is named in this ruling.
Legal formats
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Meta decks with Thrull Retainer
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