Unctus, Grand Metatect + The Watcher in the Water + Earthcraft
Unctus, Grand Metatect
The Watcher in the Water
Earthcraft
Infinite self-discard triggersNear-infinite creature ETBInfinite draw triggersInfinite lootingNear-infinite tapped creature tokensNear-infinite mana basic lands you control can produceNear-infinite untap of basic lands you control
How it works
During an opponent's turn, activate Earthcraft by tapping a blue creature you control except Unctus.
The creature triggers, causing you to loot.
The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.