Mythical Prince

Indestructible
As long as your devotion to {u/b} is less than seven, Mythical Prince isn't a creature.
Constellation — Whenever a permanent you
control is exiled by Aminatou, you get an
experience counter.
Search your library for a creature card with
converted mana cost X or less and put it onto the battlefield. Then shuffle your library.
Prince power and toughness are equal to the
number of experience counters you have.