Avenging Druid + Retreat to Coralhelm + Burning Anger

Avenging Druid

Retreat to Coralhelm

Burning Anger

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.

By enchanting Avenging Druid with Burning Anger, you grant it the ability to deal damage directly to an opponent, which immediately triggers its own library-searching ability. As that damage resolves, you begin revealing cards from your library until you hit a land card to put onto the battlefield. The arrival of that new land triggers Retreat to Coralhelm, whose landfall ability allows you to untap Avenging Druid so the whole cycle can begin anew. This creates a relentless loop that dumps every land into play, mills the rest of your library, and can redirect its fiery wrath for near-infinite damage.