Endrek Sahr, Master Breeder 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
Whenever you cast a creature spell, create X 1/1 black Thrull creature tokens, where X is that spell's mana value. When you control seven or more Thrulls, sacrifice Endrek Sahr.
Complete guide
Endrek Sahr, Master Breeder is a legendary Human Wizard who excels at generating an overwhelming army of Thrull tokens. However, his mastery comes with a dangerous catch: if his experiments become too numerous, he must be sacrificed. Understanding how to balance your Thrull population is key to maximizing his potential on the battlefield.
Breeding the Swarm
Endrek Sahr features a triggered ability that triggers whenever you cast a creature spell. Unlike many token-producing effects, this happens immediately upon casting the spell, not when the creature actually enters the battlefield. The number of 1/1 black Thrull tokens you create is equal to the mana value of the spell you just cast. For example, a spell costing four mana will generate four Thrulls.
The Weight of the Thrulls
The second ability is a state trigger: 'When you control seven or more Thrulls, sacrifice Endrek Sahr.' This ability constantly checks the game state. If you hit that magic number of seven Thrulls, the sacrifice trigger goes on the stack. Note that once this ability triggers, it won't trigger again while it is currently on the stack, but if it is countered and you still control seven or more Thrulls, it will immediately trigger again.
Common Mistakes to Avoid
A frequent error is assuming that reducing your Thrull count after the sacrifice ability has triggered will save Endrek Sahr. According to official rulings, once the ability resolves, he is sacrificed regardless of how many Thrulls you control at that moment. Another detail to remember is that face-down creature spells have a mana value of 0, meaning they will trigger Endrek Sahr but create zero Thrulls.
Strategic Implementation
To keep Endrek Sahr on the battlefield, you must use your Thrulls as resources. Sacrifice outlets are your best friend, allowing you to turn those 1/1 tokens into mana, card draw, or damage before they reach the critical mass that forces you to lose your Master Breeder. Timing your creature spells is essential to ensure you never accidentally cross the seven-Thrull threshold during your main phase.
Interaction examples
Endrek Sahr, Master Breeder
Solemn SimulacrumWith Endrek Sahr on the battlefield, you cast Solemn Simulacrum. The Master Breeder's first ability triggers because Solemn Simulacrum has a mana value of 4. You create four 1/1 black Thrull tokens. After the tokens are created, Solemn Simulacrum resolves and enters the battlefield, triggering its own ability to search for a basic land. As long as you had two or fewer Thrulls previously, Endrek Sahr remains safe.
Roaming ThroneYou control Endrek Sahr and cast Roaming Throne, choosing 'Human' as it enters. The next time you cast a creature spell, Endrek Sahr's ability triggers. Because Roaming Throne sees a triggered ability of a Human you control (Endrek Sahr), it triggers an additional time. If you cast a creature with mana value 4, you will create two separate sets of four Thrulls. However, be careful: as soon as the total number of Thrulls hits seven or more, Endrek Sahr's sacrifice ability will trigger.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Endrek Sahr, Master Breeder
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
The second ability is a state trigger. Once it triggers, it won't trigger again as long as the ability is on the stack. If the ability is countered and the trigger condition is still true, it will immediately trigger again.
No other card is named in this ruling.
- #2· Wizards of the Coast
When the second ability resolves, Endrek Sahr will be sacrificed regardless of how many Thrulls you control at that time, even if it's less than seven.
Card named in this ruling
- #3· Wizards of the Coast
Face-down spells are creature spells, but they have mana value 0.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Endrek Sahr, Master Breeder + Phyrexian Reclamation + Gray Merchant of Asphodel + Ashnod's Altar
- 1Cast Gray Merchant by paying
. - 2Endrek Sahr triggers, creating five 1/1 Thrull creature tokens.
- 3Gray Merchant enters the battlefield, causing each opponent to lose at least four life and you to gain life equal to the life you gained this way.
- 4Activate Ashnod's Altar six times by sacrificing Gray Merchant and five Thrulls, adding twelve
. - 5The Thrulls and Grey Merchant die, triggering Pitiless Plunderer six times, creating six Treasure tokens.
- 6Activate three Treasure tokens by tapping and sacrificing them, adding .
- 7Activate Phyrexian Reclamation by paying
and two life, returning Gray Merchant from your graveyard to your hand. - 8Repeat.
Endrek Sahr, Master Breeder + Phyrexian Reclamation + Gray Merchant of Asphodel + Phyrexian Altar
- 1Cast Gray Merchant by paying .
- 2Endrek Sahr triggers, creating five 1/1 Thrull creature tokens.
- 3Gray Merchant enters the battlefield, causing each opponent to lose at least four life and you to gain life equal to the life you gained this way.
- 4Activate Phyrexian Altar six times by sacrificing Gray Merchant and five Thrulls, adding .
- 5The Thrulls and Grey Merchant die, triggering Pitiless Plunderer six times, creating six Treasure tokens.
- 6Activate a Treasure token by tapping and sacrificing it, adding .
- 7Activate Phyrexian Reclamation by paying and two life, returning Gray Merchant from your graveyard to your hand.
- 8Repeat.
Endrek Sahr, Master Breeder + Phyrexian Altar + Endless Cockroaches
- 1Cast Endless Cockroaches.
- 2Endrek Sahr triggers, creating three 1/1 Thrull tokens.
- 3Sacrifice Endless Cockroaches and 3 Thrull tokens for
. - 4Endless Cockroaches returns to your hand.
- 5Repeat.
Acererak the Archlich + Endrek Sahr, Master Breeder + Phyrexian Altar
- 1Cast Acererak the Archlich.
- 2Endrek Sahr triggers, creating three 1/1 Thrull tokens.
- 3Acererak the Archlich enters the battlefield and triggers, returning Acererak the Archlich to your hand and venturing into the Lost Mine of Phandelver.
- 4Each time your trigger the Dark Pool room ability, each opponent loses one life and you gain 1 life.
- 5Activate Phyrexian Altar three times by sacrificing a Thrull token each time, adding .
- 6Repeat.
Endrek Sahr, Master Breeder + Assault Suit
- 1Whenever you control seven or more Thrulls, Endrek Sahr's second ability triggers.
- 2Resolve the ability, causing you to not sacrifice Endrek Sahr due to Assault Suit.
- 3Endrek Sahr's second ability triggers again, causing a mandatory infinite loop, ending the game in a draw.
Endrek Sahr, Master Breeder + Phyrexian Altar + Relentless Dead
- 1Cast Relentless Dead.
- 2Endrek Sahr triggers, creating two 1/1 Thrull tokens.
- 3Sacrifice Relentless Dead and 2 Thrull tokens for .
- 4Relentless Dead triggers, pay to return it to your hand.
- 5Repeat.
Ancestral Statue + Ashnod's Altar + Endrek Sahr, Master Breeder
- 1Cast Ancestral Statue.
- 2Endek Sahr triggers, creating four 1/1 Thrull tokens.
- 3Ancestral Statue enters the battlefield, returning itself to your hand.
- 4Sacrifice two Thrulls to Ashnod's Altar for .
- 5Repeat.
God-Eternal Bontu + Endrek Sahr, Master Breeder + Carnival of Souls + Deathgreeter
- 1Cast God-Eternal Bontu either from your hand or from the command zone by paying and commander tax, if applicable.
- 2Endrek Sahr triggers, creating five 1/1 Thrull creature tokens.
- 3The Thrull tokens enter the battlefield, triggering Carnival of Souls five times.
- 4Activate Phyrexian Altar by sacrificing two Thrull tokens, adding .
- 5Deathgreeter triggers twice, causing you to gain two life.
- 6Resolve each Carnival of Souls, causing you to lose five life and add .
- 7Resolve God-Eternal Bontu from step 1.
- 8God-Eternal Bontu enters the battlefield, triggering its first ability.
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