Requires

Intruder Alarm must be on the battlefield. Maskwood Nexus must be on the battlefield. Tough Cookie must be on the battlefield. Creatures you control can tap to produce at least . Mana needed:

Steps

1. Activate Tough Cookie's first ability by paying , causing Maskwood Nexus to become a 4/4 artifact creature until end of turn.
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