How can you create a combo with Marvin, Murderous Mimic, Ioreth of the Healing House?
user
[START OF COMBO]This combo can be formed with Marvin, Murderous Mimic, Ioreth of the Healing House

Color identity: U
Mana cost: 
Steps:
  1. Activate Marvin using Ioreth's second ability by tapping it, untapping Ioreth and another legendary creature.
  2. Activate Ioreth's second ability by tapping it, untapping Marvin and another legendary creature.
  3. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite untap of legendary creatures you control
  - Infinite mana legendary creatures you control can produce[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - There is at least one other legendary creature on the battlefield.
  - Marvin and Ioreth do not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant