Ire of Kaminari

The payoff at the top of an Arcane shell, and the card the rest of that subtheme exists to feed. It inverts the usual burn economy: a normal burn spell spends a card to deal a fixed amount, while this one spends four mana to cash in work you have already done, counting a graveyard full of spent spells and converting that number into damage that can be lethal. The count is non-destructive, so the yard stays intact for a second copy or any other effect that wants it; the limit is structural rather than one of cost. The deck has to be both the engine that fills the graveyard and the payoff that reads it, and Arcane never assembled enough redundancy to make the number reliable when you needed it. Splice onto Arcane, the era's signature support keyword, points the wrong direction here: splicing attaches an Arcane card's text to another spell from your hand rather than the yard, so it grows the count slowly at best and does nothing to guarantee the dense graveyard this card wants. So it sits in a familiar trap: a sorcery-magnitude payoff stapled to instant timing, which lets you hold it up as a combat trick or a finisher, yet the setup cost leaves you light on board in the games where you most need the cushion. With a loaded graveyard it ends games from nowhere; the rest of the time it is an expensive way to deal two or three.