The Land that Spooks

When this land enters the battlefield each
opponent gains X life, where X is the number of
lands on the battlefield.
{t}: Add {w} or {b}.
{w/b}{w/b}{w/b}: Create SCP: 4500, a legendary 4/4 black and white manifestation SCP with "Sacrifice SCP
4500: Creatures can't be destroyed by battle this
turn, and creatures assign combat damage as if
they weren't blocked this turn."