Intruder Alarm, Maskwood Nexus, and Workshop Elders

Prerequisites

• Intruder Alarm on the battlefield
• Maskwood Nexus on the battlefield
• Workshop Elders on the battlefield
• Creatures you control can tap to produce at least

Steps

1. At the beginning of your combat phase, Workshop Elders triggers, 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. Activate Maskwood Nexus by paying 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 , this combo nets infinite mana

Results

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