Princess Yue | Wormfang Turtle | Undercover Operative

Cards

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

Cast
Undercover Operative by paying its mana cost. Choose to have it enter as a copy of
Princess Yue.
Put
Undercover Operative into your graveyard due to the legend rule.
When
Undercover Operative 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
Undercover Operative enters, its first ability triggers, exiling it.
When
Undercover Operative leaves the battlefield, its second ability triggers, returning
Undercover Operative from exile to the battlefield. Choose to have it enter as a copy of
Princess Yue.
Repeat from step 2.