Avenging Druid + Retreat to Coralhelm + Viridian Longbow

Avenging Druid

Retreat to Coralhelm

Viridian Longbow

How it works

1. Activate Avenging Druid by tapping it, dealing 1 damage to an opponent.
2. Avenging Druid triggers, causing you to reveal a land card from your library and put it onto the battlefield, and put all other cards revealed this way into your graveyard.
3. When the land enters the battlefield, Retreat to Coralhelm triggers, untapping Avenging Druid.
4. Repeat until no lands remain in your library and/or your library is empty.

This clever loop turns Avenging Druid into a self-contained excavation engine by weaponizing Viridian Longbow to ping an opponent and trigger its library-digging ability. Every time a land hits the battlefield as a result, Retreat to Coralhelm's landfall ability immediately untaps the Druid, letting you repeat the whole process. As you dredge deeper and deeper, every nonland card gets fed straight into your graveyard while all your lands slide into play, setting up a massive board state.