Avenging Druid + Retreat to Coralhelm + Hypervolt Grasp

Avenging Druid

Retreat to Coralhelm

Hypervolt Grasp

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 ingenious loop turns a simple tap into a self-sustaining engine by utilizing Hypervolt Grasp to grant Avenging Druid the ability to ping an opponent directly. That damage triggers the Druid's mill-and-land-finding ability, dumping your library into the graveyard while accelerating every single land straight onto the battlefield. Each land drop triggers Retreat to Coralhelm, whose landfall ability instantly untaps Avenging Druid so you can repeat the process over and over again until your deck is completely empty.