Princess Yue | Wormfang Turtle

Cards

Mirror Image in hand.
Princess Yue and
Wormfang Turtle on the battlefield (
Princess Yue is not a land).

Cast
Mirror Image by paying its mana cost. Choose to have it enter as a copy of
Princess Yue.
Put
Mirror Image into your graveyard due to the legend rule.
When
Mirror Image dies, it triggers, returning it from your graveyard to the battlefield as a land named Moon. Choose to have it enter as a copy of
Wormfang Turtle, gaining its abilities.
When
Mirror Image enters, its first ability triggers, exiling it.
When
Mirror Image leaves the battlefield, its second ability triggers, returning
Mirror Image from exile to the battlefield. Choose to have it enter as a copy of
Princess Yue.
Repeat from step 2.

This combo has been estimated to be Exhibition (Bracket 1+).