User blog comment:Miskos3/Fairy Tail Episode 265: Tartaros arc: That Is the Power of Life, Review/@comment-114.108.214.81-20151226071446/@comment-7418318-20151226133724

Considering how funny it was when Frosch tried to eat Franshroom that would probably end up being hilarious, but it was Jackal who did the bombing on Kyouka's orders.

Kyouka, the one responsible for the order, is definitely dead, as is her superior and the head of Tartaros Mard Geer. Jackal, the one who did the actual bombing was soundly beaten first by Natsu and later by Lucy and died at least once at Natsu's hands (or rather at the self-destruction following his defeat) and possibly died for good in his battle with Lucy.

As the creator of the Tartaros demons and him knowing what they did without stopping them, Zeref shares some of the responsibility for the bombing of the council and I'm sure he'll be beaten (maybe even killed, as is his greatest wish?) for sure, so that piece of justice is still to come.

Mild spoiler warning:

Later in the manga Zeref even said that his creations would also perish if he died, so any surviving Demon might eventually die in the end.