Spontaneous Combustion

When Spontaneous Combustion enters the battlefield and during the beginning of your upkeep roll a d4. If you roll a 4 sacrifice Spontaneous Combustion and Spontaneous Combustion deals 5 damage to any target.
Channel—{r}, Discard Spontaneous Combustion, Sacrifice another enchantment named Spontaneous Combustion: It deals 7 damage to any target.