Lavawyrm Hellscape

When a Dragon or Human enters the battlefield,
each player discards a card and loses 1 life.
{t}: Add {b}{b} or {r}{r} to your mana pool.
{b/r}, {t}: Add {b}{b}{r}{r} to your mana pool if it
would be spent on a Dragon or Human spell.
The Wyrms of Past Eons used to live here in utter
chaos, but now they sleep in a molten grave of pain.