Mortuary + Fecundity + Phyrexian Marauder

Mortuary

Fecundity

Phyrexian Marauder

How it works

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

This clever loop exploits the zero-mana cost of Phyrexian Marauder, which enters the battlefield with zero toughness and instantly heads to the graveyard as a state-based action. That trip to the graveyard triggers Mortuary to conveniently place the artifact creature right back on top of your library, while Fecundity rewards the death by letting you draw it immediately back into your hand. By constantly recasting the Marauder for free, you generate an endless storm count alongside infinite creature enters-the-battlefield, leaves-the-battlefield, and death triggers.