Intruder Alarm + Deeproot Pilgrimage + Firdoch Core

Prerequisites

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Steps

1. 1Activate Firdoch Core's first ability by tapping it, adding one mana of any color.
2. 2Deeproot Pilgrimage triggers. Holding priority, activate Firdoch Core's second ability by paying , causing it to become a 4/4 artifact creature until end of turn.
3. 3Resolve the Deeproot Pilgrimage trigger, creating a 1/1 Merfolk creature token.
4. 4When the Merfolk enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. 5Activate Firdoch Core's first ability by tapping it, adding one mana of any color.
6. 6Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
7. 7Repeat from step 4.

Effects

• Infinite colored mana
• Infinite creature ETB
• Infinite creature tokens
• Infinite mana creatures you control can produce
• Infinite untap of creatures