Under-Construction Skyscraper

Land

Level up {1} ({1}: Put a level counter on this. Level up only as a sorcery.)
{T}: Add {C}.
LEVEL 1-7
{T}: Add {W}, {B}, {G}, or {C}.
LEVEL 8+
{T}: Add {W}, {B}, {G}, or {C}. Scry 1.