Azir, The Emperor of the Sands

Azir, The Emperor of the Sands gains X +1/+1 counters, where X is the number of creatures
you control.
When Azir attacks grant all other attacking
creatures +1/+1 until the end of your turn.
{w}{1}: Summon a 2/1 Sand Soldier token with "Ephemeral (When your turn ends or this
creature finishes an attack, discard it)"