Nothingness Spear

Split Second (This spell can't be countered)
Target X number of creatures & deal X
damage to those targets. If the creature(s) would die this turn exile it instead. If they
do not die they instead receive that many
-1/-1 counters. This spell costs {1} more
for each target beyond the first. If X is
7 or more, each opponent loses 3 life.