Thanks, I will give him a go
I've been trying it, so I think when benny spawns the rats, if it removes 4 markers, you can heal 4 health if in range of Pearl. Then, each rat that dies draws you a card, which you can keep or you discard that card to ping perdition. Lastly if someone is staggered, the swarm them is stat 6 vs stat 5(or 4)