How can you create a combo with Drafna, Founder of Lat-Nam, Thornbite Staff, Su-Chi Cave Guard, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Drafna, Founder of Lat-Nam, Thornbite Staff, Su-Chi Cave Guard, Altar of Dementia

Color identity: U
Mana cost: {11}
Steps:
  1. Cast Su-Chi Cave Guard by paying {8}.
  2. Holding priority, activate Drafna's second ability by paying {3} 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. Activate Altar of Dementia by sacrificing the Su-Chi Cave Guard token.
  5. The token Su-Chi Cave Guard dies, triggering itself and Drafna.
  6. Resolve the Su-Chi Cave Guard trigger, adding eight {C}.
  7. Resolve the Drafna trigger, untapping it.
  8. Resolve the Altar of Dementia ability, milling any player eight cards.
  9. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Drafna, Founder of Lat-Nam must be on the battlefield
  - Thornbite Staff must be on the battlefield
  - Su-Chi Cave Guard must be in your hand
  - Altar of Dementia must be on the battlefield
  - Thornbite Staff attached to Drafna.
  - Drafna does not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant