Altar of Dementia, Drafna, Founder of Lat-Nam, Intruder Alarm, and Su-Chi Cave Guard

Prerequisites

• Altar of Dementia on the battlefield
• Drafna, Founder of Lat-Nam on the battlefield
• Intruder Alarm on the battlefield
• Su-Chi Cave Guard in hand
• Drafna does not have summoning sickness
• available

Steps

1. Cast Su-Chi Cave Guard by paying
2. Holding priority, activate Drafna's second ability by paying and tapping it, copying the Su-Chi Cave Guard spell
3. Resolve the copy of the Su-Chi Cave Guard spell, creating a token copy of Su-Chi Cave Guard
4. The token Su-Chi Cave Guard enters the battlefield, triggering Intruder Alarm, untapping all creatures
5. Activate Altar of Dementia by sacrificing the Su-Chi Cave Guard token
6. The token Su-Chi Cave Guard dies, adding eight
7. Resolve the Altar of Dementia ability, milling any player eight cards
8. Repeat from step 2
9. Once you have infinite mana, you may repeat steps 2 through 4 any number of times

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers