Infinite creature ETBInfinite lifegain triggersInfinite lifegainInfinite creature tokensInfinite +1/+1 counters on a creature
How it works
Gain life.
Heliod triggers, putting a +1/+1 counter on Herd Baloth.
Herd Baloth triggers, creating a creature token.
When the creature token enters the battlefield, Auriok Champion triggers, causing you to gain 1 life.
Repeat from step 2.
This elegant loop begins with any initial lifegain, which allows Heliod, Sun-Crowned to trigger and place a +1/+1 counter on Herd Baloth. That sudden influx of power sparks Herd Baloth's own ability, birthing a 4/4 green Beast token and setting off Auriok Champion. Because Auriok Champion watches for any creature entering the battlefield, its triggered ability immediately rewards you with 1 life, feeding right back into Heliod, Sun-Crowned to perpetuate the cycle indefinitely.