Istredd gathers his strength for when Lucifer is ready to do his part. They are still an exceptional team when they put their mind to things, always in step. He has Lucifer's own mental strength along with his, they can accomplish much this way. His touch on all the infected children's mind is gentle until it's not. When they react to the sharp change from Lucifer, flinching and getting pulled away from their dolls even briefly, he makes the move.

Dispel. It is a dozen sharp cuts on strings that cannot be seen, only sensed. Puppet strings hanging over the children and in one slash he clips them, using his psionic power to do so. He was trained on how to manipulate minds and break them, but he's far more comfortable freeing them from the very things he could place down. This is in Stregobor's wheelhouse of creating what these children suffer from. He can backtrack it.

The kids don't outwardly react in an obvious way, they don't cry out or panic, but they seem to get dizzy and confused. A few drop their dolls entirely, disoriented. The others keep it with them but it's not clutched as tightly, it's not tied to them the same way. This was only a selection of children so it's not as if he had to clear a room of adults. They all pay attention to Lucifer's playing now, no longer possessed.

They're going to want to check in on the people who made these. I have a suspicion it was no simple dollmaker.