Burne, Highmoor Metropolis

Burne, Highmoor Metropolis enters the battlefield tapped. Players must
lose unspent mana at the end of their turn.
{t}: Add {s}, or {b} to your mana pool.
{t}: Add {w}, or {r}. Spend this mana only
to cast a creature spell.
"Neutral men are the devil’s allies." —Edwin Hubbel Chapin