Retreat to Emeria + Haru, Hidden Talent + Karoo

Retreat to Emeria

Haru, Hidden Talent

Karoo

How it works

1. Play Karoo.
2. When Karoo enters, it and Retreat to Emeria trigger.
3. Resolve the Retreat to Emeria trigger, creating a 1/1 Kor Ally creature token.
4. When the Kor Ally enters, Haru triggers, earthbending Karoo.
5. Resolve the Karoo trigger from step 2, causing you to sacrifice it
6. Haru triggers, returning Karoo from your graveyard to the battlefield.
7. Repeat from step 2.

This clever loop turns a self-bouncing land into an endless engine of Ally synergy. When you play Karoo, its self-sacrifice trigger and Retreat to Emeria's landfall ability both go on the stack, letting the enchantment immediately flood your board with a 1/1 white Kor Ally creature token. That new Ally triggers Haru, Hidden Talent to "earthbend" Karoo into a temporary 0/0 land creature, setting up its inevitable death when you resolve Karoo's original sacrifice requirement. Because Haru, Hidden Talent watches over your earthbended lands, its static safety net immediately snatches Karoo back from the graveyard and returns it straight to the battlefield tapped, instantly restarting the entire sequence to generate infinite landfall triggers, tokens, and enter-the-battlefield effects.