Tali'Zorah nar Rayya

Whenever you attack with one or more non-Gnome creatures, put a +1/+1 counter on Tali'Zorah nar
Rayya, then create X 1/1 colorless Gnome artifact creature tokens that are tapped and attacking, where
X is the number of +1/+1 counters on Tali'Zorah.