Cast all spells in your libraryCast any number of spells from opponents' librariesExile all librariesNear-infinite +1/+1 counters on a creatureNear-infinite creature ETBNear-infinite creature LTBNear-infinite death triggersNear-infinite green manaNear-infinite landfall triggersNear-infinite magecraft triggersNear-infinite recursion of lands you controlNear-infinite creature sacrifice triggersNear-infinite storm count
How it works
Cast Etali by paying 5
When Etali enters, it triggers.
Holding priority, activate Bartolomé del Presidio by sacrificing Etali.
When Etali dies, Yedora triggers, returning Etali from your graveyard to the battlefield face-down as a Forest land.
Resolve the Bartolomé del Presidio ability.
Holding priority, activate Etali by tapping it, adding .
Resolve the Etali trigger from step 2, exiling cards from the top of each library until each player has exiled a nonland card, and causing you to cast any number of those cards without paying its mana cost.
For each card cast, Toph's second ability triggers once.
Resolve the first Toph trigger, earthbending Etali.
Resolve any remaining triggers, earthbending any other lands you desire. If you do not want to earthbend other lands, target Etali with all remaining triggers.
Activate Bartolomé del Presidio by sacrificing Etali.
When Etali dies, Toph and Yedora trigger.
Resolve the Yedora trigger, choosing not to return Etali.
Resolve the Toph trigger, returning Etali from your graveyard to the battlefield tapped.
Repeat from step 2.
Resolve all Bartolomé del Presidio abilities from step 11.
This clever loop turns Etali, Primal Conqueror into an endlessly repeatable enter-the-battlefield engine. By sacrificing Etali to Bartolomé del Presidio right after it enters, you trigger Yedora, Grave Gardener to sneak Etali back onto the battlefield as a Forest land that can tap for green mana. From there, Toph, Hardheaded Teacher steps in: every time you cast the spells exiled by Etali's ability, Toph earthbends your land-based Etali into a creature and back again, letting Bartolomé del Presidio sacrifice it once more to reset the whole cycle and stream your entire library onto the stack.