Chain of Acid + Professor Onyx

Chain of Acid
Professor Onyx

Chain of Acid must be in hand. Professor Onyx must be on the battlefield. You control an indestructible noncreature permanent. Mana needed: 3g
  1. Cast Chain of Acid for 3g targeting an indestructible noncreature permanent you control.
  2. Professor Onyx triggers, causing each opponent to lose 2 life and you to gain 2 life.
  3. Resolve Chain of Acid, failing to destroy the target and copying Chain of Acid targeting the same permanent.
  4. Repeat from step 2.
Infinite lifegain. Infinite lifegain triggers. Infinite lifeloss. Infinite magecraft triggers.