Mortuary + Ugin's Conjurant + High-Society Hunter

Mortuary

Ugin's Conjurant

High-Society Hunter

How it works

1. Cast Ugin's Conjurant by paying 0.
2. Ugin's Conjurant enters and dies as a state-based action due to having 0 toughness, triggering Mortuary and High-Society Hunter.
3. Resolve the Mortuary trigger, putting Ugin's Conjurant from your graveyard onto the top of your library.
4. Resolve the High-Society Hunter trigger, causing you to draw a card, thus drawing Ugin's Conjurant from your library.
5. Repeat.

This loop turns the zero-mana casting cost of Ugin's Conjurant into a self-sustaining engine by exploiting its zero toughness to send it straight to the graveyard upon entry. From there, Mortuary instantly recycles it back to the top of your library, while High-Society Hunter watches the creature die and turns each iteration into a card draw that puts Ugin's Conjurant right back into your hand.