How it works
Prerequisites
- Ulamog's Dreadshire does not have summoning sickness.
Steps
- 1Activate Ulamog's Dreadsire by tapping it, creating a 10/10 Eldrazi creature token.
- 2When the Eldrazi enters the battlefield, Intruder Alarm triggers, untapping all creatures.
- 3Repeat.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Spicy tier?
Spellbook classifies this as Spicy — not for these brackets.