I took a look at the skeletal swarm in Ghosts of Saltmarsh. There’s no real resistance to single-target attacks or vulnerability to areas of effect. I wonder how important those traits would be when making swarm monsters of other varieties. What would a swarm of orcs look like? Yeah 5e has dropped that single target immunity conceit from swarms entirely.

— Dan Dillon (@Dan_Dillon_1) May 21, 2019

Do you think its better to just generally make a big monster to represent a swarm? Like using a fire giant stat block to represent a bunch of hobgoblins?

— SlyFlourish (@SlyFlourish) May 21, 2019

You can magic missile bat swarms from the MM, etc.

— Dan Dillon (@Dan_Dillon_1) May 21, 2019

I think the idea of a humanoid swarm works for things like mobs and riots. The bar brawl in Creature Codex is kinda awesome.

— Dan Dillon (@Dan_Dillon_1) May 22, 2019