I'm a bit confused over the Unique effect wording on the Small Rat Swarm card, especially the first portion:
"A player cannot nominate Small Rat Swarms to activate When Nezumi activates all Small Rat Swarms under the players control must perform the same action."
Firstly, I assume there should be a full stop after the first "activate" as "When" starts with a capital letter? The way I read the card is that the Swarms must activate at the same time as Nezumi- to all intents and purposes they are effectively one model spilt over 2-4 bases.
Secondly what if the Swarm can't perform the action? Such as a charge or interacting with an objective such as the idols?