Emeria Shepherd + World Shaper + Altar of Dementia + Troubled Healer

Emeria Shepherd

World Shaper

Altar of Dementia

Troubled Healer

How it works

1. Activate Troubled Healer by sacrificing a land.
2. Repeat step 1 until you control no lands.
3. Activate Altar of Dementia by sacrificing World Shaper.
4. When World Shaper dies, it triggers, return all lands from your graveyard to the battlefield tapped.
5. When the lands enter, Emeria Shepherd triggers that many times.
6. Resolve an Emeria Shepherd trigger that was triggered by a Plains, returning World Shaper from your graveyard to the battlefield.
7. Resolve all remaining Emeria Shepherd triggers.
8. Resolve the Altar of Dementia ability.
9. Repeat

This engine relies on recycling your own resources by turning land management into a powerful recursion loop. You begin by stripping your board of lands using Troubled Healer's activation cost, sending those lands straight to your graveyard. Next, you sacrifice World Shaper to Altar of Dementia, which not only mills your library but triggers the Shaper's death ability to flood the battlefield with all those lands at once. That mass arrival triggers Emeria Shepherd repeatedly, allowing you to bypass your hand and drop World Shaper directly back onto the battlefield whenever a Plains enters.