Blood Researcher 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
Menace (This creature can't be blocked except by two or more creatures.) Whenever you gain life, put a +1/+1 counter on this creature.
How it works : Blood Researcher
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
If you gain life at the same time Blood Researcher is dealt lethal damage, it dies before its ability can put a +1/+1 counter on it.
No other card is named in this ruling.
- #2· Wizards of the Coast
An ability that triggers “whenever you gain life” triggers just once for each life gain event, no matter how much life you gain.
No other card is named in this ruling.
- #3· Wizards of the Coast
Each creature with lifelink dealing combat damage causes a separate life gain event. For example, if two creatures you control with lifelink deal combat damage at the same time, a “whenever you gain life” ability will trigger twice. However, if a single creature you control with lifelink deals combat damage to multiple creatures, players, and/or planeswalkers at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will trigger only once.
No other card is named in this ruling.
- #4· Wizards of the Coast
If you gain an amount of life “for each” of something, that life is gained as one event and the ability will trigger only once.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Agatha's Soul Cauldron + Blood Researcher + Walking Ballista
- 1Activate Blood Researcher by using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to any target and causing you to gain 1 life due to its lifelink.
- 2Blood Researcher triggers, putting a +1/+1 counter on it.
- 3Repeat.
Agatha's Soul Cauldron + Spike Feeder + Blood Researcher
- 1Activate Blood Researcher using Spike Feeder's second ability by removing a +1/+1 counter from it, causing you to gain 2 life.
- 2Blood Researcher triggers, putting a +1/+1 counter on it.
- 3Repeat.
Agatha's Soul Cauldron + Triskelion + Blood Researcher
- 1Activate Blood Researcher by using Triskelion's ability by removing a +1/+1 counter from it, dealing 1 damage to any target and causing you to gain 1 life due to its lifelink.
- 2Blood Researcher triggers, putting a +1/+1 counter on it.
- 3Repeat.
Shalai and Hallar + Blood Researcher
- 1Give Shalai and Hallar lifelink, if needed.
- 2Gain life.
- 3Blood Researcher triggers, putting a +1/+1 counter on it.
- 4Shalai and Hallar triggers, dealing damage to an opponent and causing you to gain life.
- 5Repeat from step 3.
Agatha's Soul Cauldron + Blood Researcher + Deathbringer Thoctar
- 1Activate Blood Researcher by using Deathbringer Thoctar's ability by removing a +1/+1 counter from it, dealing 1 damage to any target and causing you to gain 1 life due to its lifelink.
- 2Blood Researcher triggers, putting a +1/+1 counter on it.
- 3Repeat.
All Will Be One + Blood Researcher + Bloodthirsty Conqueror
- 1Gain life.
- 2Blood Researcher triggers, putting a +1/+1 counter on it
- 3All Will Be One triggers, dealing 1 damage to an opponent.
- 4Bloodthirsty Conqueror triggers, causing you to gain 1 life.
- 5Repeat from step 2.
All Will Be One + Blood Researcher + Exquisite Blood
- 1Gain life.
- 2Blood Researcher triggers, putting a +1/+1 counter on it
- 3All Will Be One triggers, dealing 1 damage to an opponent.
- 4Exquisite Blood triggers, causing you to gain 1 life.
- 5Repeat from step 2.
Legal formats
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Meta decks with Blood Researcher
No archived Top 8 deck with this card yet.













