Ulnrae and Yulina Duskryn

Whenever a token you control leaves the battlefield, put a +1/+1 counter on Ulnrae and Yulina Duskryn.
When Ulnrae and Yulina Duskryn leave the battlefield, create X 1/1 Drow Warrior creature tokens with Flanking and First Strike, where X is Ulnrae and Yulina Duskryns power.
Equipping this creature costs {2} less.