Marvin, Murderous Mimic + Ioreth of the Healing House

Marvin, Murderous Mimic

Ioreth of the Healing House

How it works

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.

This clever loop turns Marvin, Murderous Mimic into a one-robot relay team by having him copy Ioreth of the Healing House's second activated ability. Since Marvin shares Ioreth's aptitude for untapping two other target legendary creatures, you can tap Marvin to untap Ioreth and another legendary creature, then tap Ioreth to untap Marvin and that same legendary partner. Back and forth they feed each other untaps, generating infinite activations that can be leveraged to endlessly untap any legendary creatures you control and milk their activated abilities for all they're worth.