Life and Limb + Xenograft + Scute Swarm

Life and Limb

Xenograft

Scute Swarm

How it works

1. Play any land.
2. When the land enters the battlefield, each Scute Swarm you control triggers.
3. Resolve the first trigger, creating either a 1/1 Insect creature token or a token copy of Scute Swarm.
4. When the creature token enters the battlefield as a 1/1 Saproling that is also a Forest land due to Life and Limb and Xenograft, each Scute Swarm you control triggers.
5. Repeat from step 3.
6. NOTE: This combo creates an infinite mandatory loop that will draw the game if it is not interacted with.

This brilliant botanical engine creates an unstoppable cascade of mandatory triggers that loops infinitely, ending in a drawn game if left unchecked. The magic begins when Xenograft names "Saproling" so that every creature you control inherently shares that type with Life and Limb, which simultaneously transforms every Forest and Saproling into both a 1/1 green Saproling creature and a Forest land. Because of this continuous type-overlapping, every token generated by Scute Swarm enters the battlefield simultaneously as a creature and a land, instantly triggering Scute Swarm all over again to spawn another hybrid copy.