If that creature happens to be a Kracken, Leviathan, Octopus, or Serpent, you make two tokens instead
Savage BeatingSavage Beating (27,982 Inclusions, 1% of 2,721,129 Decks) Savage BeatingSavage Beating does fit that "end it earlier" description, and can also get a couple extra mana thrown into it to guarantee the thing with an extra combat
Reparations Once again we have an elegant card that gets the most you could possibly get out of five mana in terms of damage-based removal short of an even bigger drawback
Norman OsbornNorman Osborn is one of the most popular commanders from this year and absolutely loves when you throw your spells into the bin, so that you can cast them for their mayhem cost
Its strong, and like most expensive spells needs to be evaluated in the knowledge that ramping artifacts to get to higher mana quantities is easier than doing it playing any color, barring perhaps green