Fuhren, Spirits' Guide

First Strike, Haste, Lifelink, Flash
Whenever Fuhren, Spirits' Guide attacks, put X 1/1 White Flying Spirit token onto the battlefield tapped and attacking. Where X is Fuhren, Spirits' Guides' power.
Whenever a nontoken spirit creature you control enters the battlefield, put a +1/+1 counter on Fuhren, Spirits' Guide.