Classroom Trap

When this card becomes equipped to a creature
an opponent controls put 5 chain counters on
this card at the begging of each upkeep put 2
-1/-1 counters on that creature if that creature is
still alive when the counters on this card are 0 deal damage to this equipments controller equal to that creatures original power otherwise that creatures controller loses life equal to its original power
Equip {3}