*****Also a PO deck with an artifact win con is pretty cool!!!
If this triggered on artifact spells I'd agree with you. I don't think this is reliable in PO with the instans and sorceries only clause. Is it?
It increases damage by number of spells cast (including artifacts). So the first 5 artifact PO does 5 damage the second does 12-16 the third in the chain wins. It's like Mentor, you cast it as you go off.