Herd Baloth + Sunbond + Thunder of Unity

Herd Baloth

Sunbond

Thunder of Unity

How it works

1. Gain life.
2. Sunbond triggers, putting a +1/+1 counter on Herd Baloth.
3. Herd Baloth triggers, creating a creature token.
4. When the creature token enters the battlefield, Thunder of Unity triggers, causing you to gain 1 life and each opponent to lose 1 life.
5. Repeat from step 2.

This loop transforms a single instance of lifegain into a self-sustaining engine of growth and damage. With Sunbond enchanting Herd Baloth, gaining life triggers the enchantment to place +1/+1 counters on the Baloth, which in turn causes the Baloth's own ability to create a 4/4 green Beast creature token. Because Thunder of Unity has reached its second or third lore counter, that newly entering token triggers its life-draining ability, putting the life back into your total to fuel Sunbond all over again.