Whenever Ashling, the Extinguisher deals combat damage to a player, choose target creature that player controls. The player sacrifices that creature.
7/1/2013 The target of the ability is chosen when Ashling’s ability is put on the stack. When the ability resolves, the player dealt combat damage by Ashling sacrifices that creature if they still control it. Neither regeneration nor indestructibile can save a creature from being sacrificed.