Prerequisites
- Intruder Alarm on the battlefield
- Bloodline Keeper // Lord of Lineage on the battlefield
Steps
- Activate Bloodline Keeper's first ability by tapping it, creating a 2/2 Vampire creature token with flying
- Vampire token enters the battlefield, triggering Intruder Alarm, untapping all creatures
- Repeat
Results
- Infinite mana creatures you control can produce
- Infinite untap of creatures
- Infinite creature tokens
- Infinite creature ETB
Required Cards 2

Intruder Alarm
Enchantment

Bloodline Keeper // Lord of Lineage
Creature — Vampire // Creature — Vampire