Sangyu of the Blighted Sands

Sangyu of the Blighted Sands is unblockable.
Whenever Sangyu of the Blighted Sands attacks,
each opponent discards a card.
Whenever a player discards a card you may put a
+1/+1 counter on Sangyu of the Blighted Sands.
From the old gods remains we shall start anew.
We shall be strong.