Maggeal, Cruel Entertainer

Only lands can produce mana
Mana doesn't empty from your mana pool
{2}{b/r} {b/r} Target opponent discards a card at
random you either gain X colorless mana or that
opponent loses X life where X is the discarded
cards converted mana cost
{t}{1}{r/w}{r/w} Destroy target permanent you gain life
equal to its mana cost minimum of 1