Zirneklis, Swarm Guide

Vigilance, deathtouch, protection from black
Every time you cast a spider spell, put a +1/+1
counter on Zirneklis, Swarm Guide.
Whenever another creature damaged this turn
by a Spider you control dies, its controller loses
life and you gain life equal to the strength of Zirneklis, swarm guide.
(Guide the swarm, satiate hunger)