Zimone and Dina + Abundance + Retreat to Coralhelm + Scute Swarm

Zimone and Dina

Abundance

Retreat to Coralhelm

Scute Swarm

How it works

1. Activate Zimone and Dina by tapping it and sacrificing another creature, causing you to reveal cards from the top of your library until you reveal a land card, put it into your hand, then put the land onto the battlefield tapped, and repeat this process once if you control at least eight lands.
2. Retreat to Coralhelm and each Scute Swarm you control trigger for each land that enters the battlefield this way.
3. Resolve the Retreat to Coralhelm trigger(s), untapping Zimone and Dina.
4. Resolve the Scute Swarm trigger(s), creating that many creature tokens.
5. Repeat.

This loop turns Zimone and Dina into an infinite-value engine by weaving together land drops and creature generation. When you sacrifice a creature to draw, Abundance replaces the draw with a land, triggering the land-dependent abilities of both Scute Swarm and Retreat to Coralhelm. The landfall trigger from Retreat to Coralhelm untaps Zimone and Dina so you can sacrifice the newly spawned insect tokens from Scute Swarm to repeat the process.