Iridhys' Arcomance

Iridhys' Arcomance enters play tapped.
If one or more +1/+1 counters would be put on
a creature you control, that many plus one +1/+1
counters are put on it instead.
{1}{g}{u}, {t}, Sacrifice Iridhys' Arcomance:
Put a +1/+1 counter on target creature you
control, then double the number of +1/+1
counters on that creature.