Earthcraft + Regal Behemoth + Sliver Queen

Earthcraft

Regal Behemoth

Sliver Queen

How it works

1. Activate Sliver Queen by paying 2, creating a creature token
2. Activate Earthcraft by tapping the creature token, untapping a basic land.
3. Activate the land by tapping it, adding 1
4. Regal Behemoth triggers, adding 1
5. Repeat

This ingenious loop turns Sliver Queen into a self-sustaining token generator by leveraging Earthcraft to untap a basic land whenever a new token arrives. Normally, Earthcraft's activation costs you a creature to yield just one mana, but Regal Behemoth completely breaks that math by doubling your land's output simply because you are the monarch. With the extra mana generated by Regal Behemoth covering the cost to activate Sliver Queen again, you generate an endless cascade of creatures and tapped tokens without ever running dry.