Phlegethon, River of Fire

Phlegethon, River of Fire enters the battlefield tapped.
{t} Add one mana of any color, among the mana symbols of cards in your graveyard, to your mana pool.
{1} {t} Put a fire counter on Phlegethon, River of Fire. Then, Phlegethon, River of Fire deals damage to target creature an opponent controls and target creature you control equal to the amount of fire counters on Phlegethon, River of Fire.