With {blood artist} on the board Can I {killing wave} for zero and choose to sac all my creatures to do damage, or do I have to give a value to x?
X can be 0. But with {Killing Wave} id at least do 1 so ur oppenent would pay 1 life to keep his while u sac urs
Yeah, the goal is to have a few {blood artist}'s out hen I do it, the though was to hit with the sac, and still have mana to cast other thing but you're right. Mostly confirming a theory here...
You could, but you may as well sac them to do something useful. Like {Bloodflow Connoisseur}. But if it's part of a bigger plan, I gotcha.