Intruder Alarm + Maskwood Nexus + Rise and Shine

Intruder Alarm

Maskwood Nexus

Rise and Shine

How it works

1. Cast Rise and Shine by paying 1, causing Maskwood Nexus to become a 0/0 artifact creature, then putting four +1/+1 counters on it.
2. Activate any number of mana-producing creatures you control by tapping them, adding at least 3.
3. Activate Maskwood Nexus by paying 3 and tapping it, creating a 2/2 Shapeshifter creature token.
4. When the Shapeshifter enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. Repeat from step 2.
6. If creatures you control can tap to produce at least 4, this combo nets infinite mana.

By casting Rise and Shine with its overload cost, every noncreature artifact you control—including Maskwood Nexus—becomes a living creature pumped up by four +1/+1 counters, allowing them all to tap for mana. Thanks to the changeling trait granted by Maskwood Nexus, every token you create counts as every creature type, which immediately triggers Intruder Alarm's static ability to untap all of your creatures whenever a new one enters the battlefield. This creates a brilliant self-sustaining loop: you spend the mana generated by your tapped creatures to activate Maskwood Nexus, and each resulting creature token untaps the entire board so you can repeat the process indefinitely.