Princess Yue + Wormfang Turtle + Vesuvan Shapeshifter

Steps

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