Mortuary + Fecundity + Chamber Sentry

Mortuary

Fecundity

Chamber Sentry

How it works

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

This loop is a masterclass in recycling, turning the repeated self-sacrifice of Chamber Sentry into a bottomless well of resources. Because Chamber Sentry enters with zero toughness when cast for zero mana, it immediately hits the graveyard as a state-based action, reliably triggering both Mortuary to tuck it safely back onto your library and Fecundity to instantly draw it right back into your hand. Every single iteration of this cycle costs you nothing yet yields a fresh card, fueling endless death triggers and a soaring storm count with elegant, self-sustaining efficiency.