Rat Swarm

Rat swarm is every Clan type
Rat swarm's power and toughness are equal to
the number of Skaven you control

"The tide of monstrous rats flowed over them one by
one, dragging them down to be torn apart, the yellow
chisel-teeth sinking into their soft-flesh, the dark-furred
mass drowning their pitiful screams with their hideous
chittering..."