Fathom Mage + Shabraz, the Skyshark + Heliod, Sun-Crowned

Fathom Mage

Shabraz, the Skyshark

Heliod, Sun-Crowned

How it works

1. Gain life.
2. Heliod triggers, putting a +1/+1 counter on Fathom Mage.
3. Fathom Mage triggers, causing you to draw a card.
4. Shabraz triggers, causing you to gain 1 life and put a +1/+1 counter on it
5. Repeat from step 2.

This loop transforms a single instance of life gain into an endless, self-sustaining cascade of card draw, counters, and further life. It all starts when Heliod, Sun-Crowned rewards you with a +1/+1 counter whenever you gain life, which you drop onto Fathom Mage. Fathom Mage's innate trigger turns that new counter into a drawn card, and every single card draw instantly wakes up Shabraz, the Skyshark to gain you a life and grow larger. That fresh life gain loops right back into Heliod, Sun-Crowned to re-trigger Fathom Mage, keeping the magnificent avian and wizard feeding each other until your deck is safely in your hand.