Mortuary + Grim Haruspex + Cryptic Trilobite

Mortuary

Grim Haruspex

Cryptic Trilobite

How it works

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

This ingenious loop turns Cryptic Trilobite's lack of a mana cost into an asset by casting it for zero mana, immediately sending the creature straight to the graveyard as a state-based action with zero toughness. That constant cycle is caught by Mortuary, which whisks Cryptic Trilobite right back to the top of your library instead of letting it rest in peace. Meanwhile, Grim Haruspex watches the procession and happily converts every single trip to the graveyard into a drawn card, putting Cryptic Trilobite right back into your hand to start the cycle anew.