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

Near-infinite damage

Syr Konrad, the Grim

Relentless Rats

Secret Salvage

Tormod's Crypt

Cast Secret Salvage by paying {3}{B}{B}, exiling Relentless Rats from your graveyard and causing you to search your library for all copies of Relentless Rats in your library and put them into your hand.
Syr Konrad triggers, dealing 1 damage to each opponent.
Move to your cleanup step, causing you to discard down to your maximum hand size, ensuring to discard as many copies of Relentless Rats as possible.
Syr Konrad triggers for each creature card discarded this way, dealing that much damage to each opponent.
During the next player's turn, cast Surgical Extraction by paying {B/P}, exiling all copies of Relentless Rats from your graveyard.
Syr Konrad triggers for each creature card exiled this way, dealing that much damage to each opponent.

Surgical Extraction

Cast Secret Salvage by paying {3}{B}{B}, exiling Relentless Rats from your graveyard and causing you to search your library for all copies of Relentless Rats in your library and put them into your hand.
Syr Konrad triggers, dealing 1 damage to each opponent.
Move to your cleanup step, causing you to discard down to your maximum hand size, ensuring to discard as many copies of Relentless Rats as possible.
Syr Konrad triggers for each creature card discarded this way, dealing that much damage to each opponent.
Activate Tormod's Cryptkeeper by tapping and sacrificing it.
When Tormod's Cryptkeeper dies, Syr Konrad triggers, dealing 1 damage to each opponent.
Resolve the Tormod's Cryptkeeper ability, exiling your graveyard.
Syr Konrad triggers for each creature card exiled this way, dealing that much damage to each opponent.

Combos with "Relentless Rats"