Arlan, Slayer of Drakorra

Whenever Arlan, Slayer of Drakorra attacks
you may remove any number of +1/+1 counters from target creature you control, if
you do put that many +1/+1 counters
on Arlan, Slayer of Drakorra.
{2}{w} put a +1/+1 counter on target creature
you control.