The Tree Where it Began

The Tree Where it Began enters tapped
{t}: {w}, {u}, or {b}
{x}{x}{x}{t}: Put X corpse counters on The Tree
Where it Began.
{x}{t}: Remove X corpse counters from The Tree
Where it Began, amass X.
{x}{x}{t}: Remove X corpse counters from The
Tree Where it Began, put X 2/2 Black Wight
creature tokens onto the battlefield under your
control.