Grim Thoroughfare

Grim Thoroughfare enters the battlefield tapped.
{t}: Add {b} or {r} to your mana pool
Pay 1 life, {t}: Add {u} or {g} to your mana
pool.
Mana produced by this land can't be spent to cast white spells.
"These streets brutalized me, rejected me, and made
me the shrewd fearless leader I am today."-Armeki