Helm of Eldritch Command

When the bearer attempts to dispel and endless spell, if the dispel roll is greater than the casting value of that endless spell, instead of it being dispelled you can say the bearer has seized control of it. If you do so, the bearer now controls that endless spell in the same manner as if they had summoned it, and the model that summoned the endless spell does not control it. If that endless spell is later dispelled and summoned again the bearer does not control it.