Thread:NubatamaNinja/@comment-6053530-20140428033645/@comment-13275021-20140428063830

I don't have anything in writing, but it's only logical that the turn player had priority once again after the call fully resolves. The turn player should always have priority during his own main phase. xD

As for your Cerberus example:

If the Danger World player activates Cerberus's first ACT, and the Magic World player doesn't respond, then the targeted monster successfully enters the soul of Armorknight Cerberus. Then, the Danger World will have priority again. At this point, if Full Fire is activated, and the Magic World player responds with Magical Goodbye, the Danger World player has a couple of options:

When Magical Goodbye resolves, the player can activate Armorknight Cerberus's Soulguard ability, keeping him on the field. Then, when Full Fire tries to resolve, if there aren't any monsters in the soul, Full Fire's cost (discard one soul) can't be paid, so the ability doesn't resolve any further.

However, if there are still cards remaining in the soul, then Full Fire's cost can still be paid, and the targeted monster will be destroyed.

If Armorknight Cerberus actually leaves the field due to Magical Goodbye, then all soul must be discarded, and therefore, Full Fire can't resolve.