Kyorvai, Paragon of the King

Phasing {3}{w/u} (You may pay this creature's
phasing cost. If you do, this creature phases out
until your next upkeep.)
Whenever Kyorvai phases in, create a 4/4 white
and blue Spirit Dragon creature token with flying
and vigilance.
If you control Thezi, King of the Blue Moon,
Kyorvai gains hexproof, and whenever it deals
combat damage to a player, you may phase out
target nonland permanent that player controls
until Kyorvai phases out.