Enhancer Of Ugin

Spirit Dragons you control get +1/+1.
{1}{c}: Put a -1/+1 counter on each Spirit Dragon you control.
{1}{c}: Put a +1/-1 counter on each Spirit Dragon you control.
{0}: Remove all +1/-1 or-1/+1 counters from each Spirit Dragon you control.
Spirit Dragons you control can only have one
+1/-1 or-1/+1 counter on them.