Draakir, God of Shadows

When Draakir, God of Shadows enters the battlefield, flip a coin for each creature on the battlefield. For each flip you win, put a shadow counter on that creature.
Whenever another creature enters the battlefield,
flip a coin. If you win the flip, put a shadow
counter on that creature.
Remove a shadow counter from target creature:
Put a shadow counter on another target creature. Activate this ability only once each turn.