The first line of defense against Urza and Mishra, the Artifact Blast achieved widespread fame until an unlucky mage discovered it was useless on the devices the brothers had already created
Being unique means comparing them to creatures isn't accurate but then nor is comparing them to equipment
I guess the theory is supposed to be Polukranos, but that one was also weird, a bit of a bleed, and at least Polukranos had to actually fight the targets
Coming in around the $500-$600 range, Burn is powerful and easy to pick up, and it doesnt change much from set to set
Its drawback may look like its very punishing and can allow the opponent to surprise you via a mid-combat spell, but I never really saw that scenario play out since its damage prevention ability is a a conditional static ability so as long as its on when damage is dealt, it wont be prevented. (Thank you, @fenaris!) It usually plays out somewhat like a colorless Ashenmoor Gouger / Chimeric Idol where you typically dont bother trying to block with it (why am I blocking with my aggro guys anyway?) and, if need be, you cast a spell pre-combat to activate it (typically I used a large coin, like a quarter, to denote whether it was on or off)