Great and Spacious Building

When Great and Spacious Building enters the battlefield, put a +1/+0 sin counter on every creature. Every creature with a +1/+0 sin counter is black in addition to its other colors.
Whenever a noninstant spell is cast, the spell's owner may replace one sin counter on any creature with a +0/-5 counter.
{t}{1}, Remove a sin counter from a creature you control.