Azir, Emperor of the Sands

At the beginning of your combat phase, create a 1/1 white Sand Soldier creature token tapped and attacking.

Level up (When you've create 12 or more creature or artifacts, give Azir +1/+1 and "When you create a creature, give both it and Azir +1/+0 until end of turn.")

Ascend (When Sun Disc has zero counters on it and Azir has levelled up, give Azir +4/+0 and "At the beginnig of your combat phase, summon a 5/2 red Sandstone Charger." You may play cards from your graveyard.)