How it works
Prerequisites
- You control an indestructible noncreature permanent.
Steps
- 1Cast Chain of Acid for targeting an indestructible noncreature permanent you control.
- 2Professor Onyx triggers, causing each opponent to lose 2 life and you to gain 2 life.
- 3Resolve Chain of Acid, failing to destroy the target and copying Chain of Acid targeting the same permanent.
- 4Repeat from step 2.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Spicy tier?
Spellbook classifies this as Spicy — not for these brackets.