Dark-Space Generator

You may choose not to untap Dark-Space
Generator during your untap step.
{2}{t}: Gain control of target permanent, it loses
all abilities and becomes Dark-Space in addition
to its other types for as long as Dark-Space
Generator remains tapped.
At the beginning of your end step if you control
three or more Dark-Space permanents create a
0/8 colorless Dark-Space Aberration creature
token with defender and flying.