Martin, Omenpath Traveler

Fliying, hexproof
Other creatures from outside the game get +X/+X, where X is the number of creatures from outside the game on the battlefield.

At the begining of your endstep, reveal the top two cards from the spellbook sidedeck. Put one on the battlefield under your control, and the other in a random opponent hand. Each player conjures a Weatherlight conjuration in their command zone.