How it works
Prerequisites
- Blood Researcher has at least one +1/+1 counter on it.
Steps
- 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.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?