Valkyrie's Call, Amoeboid Changeling, Intruder Alarm, and Blasting Station

Prerequisites

• Valkyrie's Call on the battlefield
• Amoeboid Changeling on the battlefield
• Intruder Alarm on the battlefield
• Blasting Station on the battlefield
• undefined

Steps

1. Activate Amoeboid Changeling's second ability by tapping it, causing another nontoken creature you control to lose all creature types until end of turn
2. Activate Blasting Station by tapping it and sacrificing the creature targeted in step 1
3. When the creature dies, Valkyrie's Call triggers, returning the creature from your graveyard to the battlefield as a white Angel
4. When the creature enters the battlefield, Intruder Alarm and Blasting Station triggers, untapping all creatures and Blasting Station
5. Resolve the Blasting Station ability from step 2
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage
• Infinite untap of creatures
• Infinite mana creatures you control can produce