Unctus, Grand Metatect + The Watcher in the Water + Grand Architect

Prerequisites

• It is an opponent's turn.

Steps

1. 1During an opponent's turn, activate Grand Architect by tapping a blue creature you control except Unctus, adding that can only be spent to cast artifact spells or to activate abilities of artifacts.
2. 2The creature triggers, causing you to loot.
3. 3The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.
4. 4Repeat.

Effects

• Infinite draw triggers
• Infinite looting
• Infinite self-discard triggers
• Near-infinite colorless mana that can only be spent to activate abilities of artifacts
• Near-infinite colorless mana that can only be spent to cast artifact spells
• Near-infinite creature ETB
• Near-infinite tapped creature tokens