Tarmogoyf Nest + Intruder Alarm + Roaring Earth

Tarmogoyf Nest

Intruder Alarm

Roaring Earth

How it works

1. Activate Roaring Earth by paying 1 and discarding it, causing the land with Tarmogoyf Nest attached to become a creature until end of turn.
2. Activate any number of creatures you control by tapping them, adding at least 1.
3. Activate the land with Tarmogoyf Nest attached by paying 1 and tapping it, creating a Tarmogoyf creature token.
4. When the Tarmogoyf enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. Repeat from step 2.

By animating your enchanted land into a creature using the channel ability of Roaring Earth, you turn it into an eligible participant for Intruder Alarm's static untap trigger. Tarmogoyf Nest then provides the engine: every time you pay to create a Tarmogoyf token, Intruder Alarm untaps all your creatures—including the animated land and any other mana sources you tapped—allowing you to generate an infinite loop of creature tokens and entering-the-battlefield triggers.