Merfolk Windrobber [Zendikar Rising]

Description

Set:	Zendikar Rising
Type:	Creature — Merfolk Rogue
Rarity:	Uncommon
Cost:	{U}

Flying
Whenever Merfolk Windrobber deals combat damage to a player, that player mills a card. (They put the top card of their library into their graveyard.)
Sacrifice Merfolk Windrobber: Draw a card. Activate this ability only if an opponent has eight or more cards in their graveyard.