Resources

Magic: The Gathering Comprehensive Rules Changes

Coldsnap to Time Spiral (Single Change View)

General changes

Old rule (Coldsnap) New rule (Time Spiral)

420.5n.

If a permanent has both a +1/+1 counter and a -1/-1 counter on it, N +1/+1 and N -1/-1 counters are removed from it, where N is the smaller of the number of +1/+1 and -1/-1 counters on it.