Syr Konrad, the Grim + Rat Colony + Secret Salvage + Tormod's Crypt

Syr Konrad, the Grim

Rat Colony

Secret Salvage

Tormod's Crypt

How it works

1. Cast Secret Salvage by paying 3, exiling Rat Colony from your graveyard and causing you to search your library for all copies of Rat Colony in your library and put them into your hand.
2. Syr Konrad triggers, dealing 1 damage to each opponent.
3. Move to your cleanup step, causing you to discard down to your maximum hand size, ensuring to discard as many copies of Rat Colony as possible.
4. Syr Konrad triggers for each creature card discarded this way, dealing that much damage to each opponent.
5. Activate Tormod's Crypt by tapping and sacrificing it, exiling your graveyard.
6. Syr Konrad triggers for each creature card exiled this way, dealing that much damage to each opponent.

This clever loop weaponizes the sheer density of a swarm by drawing every single copy of Rat Colony straight out of your library with the help of Secret Salvage. Since your hand will inevitably overflow after this massive tutor, you naturally discard the excess rats during your cleanup step, feeding them into the graveyard where Syr Konrad, the Grim stands ready to punish your opponents for every single creature that leaves or enters the bin. To round out the carnage, Tormod's Crypt steps in to sweep away your entire graveyard at once, triggering Syr Konrad one last time for each exiled rat to drain away whatever life your opponents have left.