Professor Onyx + Chain of Smog
Produces: Infinite lifegain, Infinite lifegain triggers, Infinite lifeloss, Infinite magecraft triggers
- Color identity
- B
- Mana
- {1}{B}
Steps
- Cast Chain of Smog by paying {1}{B}, targeting yourself.
- Professor Onyx triggers, causing each opponent to lose 2 life and you to gain 2 life.
- Resolve Chain of Smog, discarding two cards if possible, then copying the spell without choosing a new target.
- Repeat from step 2.
How to execute this combo
The "Professor Onyx + Chain of Smog" combo takes 4 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite lifegain, Infinite lifegain triggers, Infinite lifeloss, Infinite magecraft triggers.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.