Pentavus + Earthcraft + Intruder Alarm

Pentavus

Earthcraft

Intruder Alarm

How it works

1. Activate Earthcraft by tapping Pentavus, untapping a basic land you control.
2. Activate a basic land you control by tapping it, adding 1.
3. Activate Pentavus' first ability by paying 1 and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token.
4. The Pentavite enters the battlefield, triggering Intruder Alarm.
5. Holding priority, activate Earthcraft by tapping the Pentavite, untapping a basic land you control.
6. Activate a basic land you control by tapping it, adding 1.
7. Resolve the Intruder Alarm trigger, untapping all creatures.
8. Activate Earthcraft by tapping the Pentavite, untapping a basic land you control.
9. Activate a basic land you control by tapping it, adding 1.
10. Activate Pentavus' second ability by paying 1 and sacrificing a Pentavite, putting a +1/+1 counter on Pentavus.
11. Repeat.