Azir, Emperor of Shurima

When Azir enters the battlefield and at the
beginning of your upkeep, create a 2/1 Sand
Soldier creature token with defender and
double strike. When Azir dies, destroy all Sand
Soldier tokens you control.
At the beginning of your end step, if you control
six or more Sand Soldier creature tokens, create
The Sun Disk, a legendary artifact with "Sand
creatures you control get +1/+1 and lose
defender" and "{1}, {t}: add {w}{r}"