Flaming Demise

({p/r} can be paid with either {r} or 2 life.)
Flaming Demise enters the battlefield with X inferno counters on it.
At the beginning of your upkeep, you may pay {x}. If you do, put X inferno counters on Flaming Demise. Otherwise, sacrifice Flaming Demise. It deals X damage to each of up to X targets, where X is the number of inferno counters on it.