Heart of Kiran - 153 M AER

Flying, vigilance
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)
You may remove a loyalty counter from a planeswalker you control rather than pay Heart of Kiran's crew cost.

mythic
Legendary Artifact — Vehicle
From the Magic: The Gathering set Aether Revolt.