Thread:Maxus1576/@comment-5298730-20150704015630/@comment-7341673-20150704020300

From the Ultima Summon page:

"and the appropriate monster listed in the Ultima Card's Card Text in the same Monster Zone as the Tags you are using for the Summon."

Basically, if you wanna Ultima Summon a Card using a monster in your middle Monster Zone, the Tags used for that Ultima Summon have to be in that (middle) Monster Zone.

It's kinda confusing, but that's due to how bad I am at wording things....