Avenging Druid + Retreat to Coralhelm + Arcane Teachings

Avenging Druid

Retreat to Coralhelm

Arcane Teachings

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 land-discovery into a self-sustaining engine by outfitting Avenging Druid with the granting of Arcane Teachings, allowing it to ping an opponent directly and trigger its own library-scouring ability. Every time that hit happens, the revealed land enters the battlefield to instantly wake up Retreat to Coralhelm, which triggers a fresh untap of the druid so the whole process can repeat. The enchantment's granted tap ability provides the crucial bridge between combating for lands and generating the landfall triggers that keep the untap sequence flowing.