Stand your ground

Split Second.
Target creature gains shroud until end of turn
and must block this turn. Creatures affected by
this card may block even when tapped and may
block a creature they normally couldnt block.
Overload {3}{g}{g} (You may cast this spell for its
overload cost. If you do, change its text by
replacing all instances of "target" with "each").
"No one shall pass!"