Mikaeus, the Unhallowed + Solemnity + Phantasmal Image

Mikaeus, the Unhallowed

Solemnity

Phantasmal Image

How it works

1. Cast Phantasmal Image by paying 1, having it enter as a copy of Mikaeus.
2. Choose to have Phantasmal Image put into your graveyard due to the legend rule.
3. Phantasmal Image dies, triggering its undying ability, returning itself to the battlefield with no +1/+1 counters due to Solemnity, as a copy of Mikaeus.
4. Repeat from step 2.