I'm not sure either but they say that Fianmma is summoning a robot type index.
Here's a pic of index in john pen mode controlled by Fianmma in novel vol 18.
Okay, it looks like kazakiri is still ongoing to russia.
Spoiler for summary vol 20:
Russia, being manipulated by Fianmma, declares war against academy city saying that their technology will lead the world to destruction. Either share what they've been studying or face consequences, and begin their attack.
Academy city in response says that they can't sit idly when they have the power to stop the world from going into war, and start invading Russia (lol).
Japanese government don't want Academy city to retaliate, but shuts up after Academy city shows them a clip of them shooting Russian missiles down, saying "we don't need to protect you, you know?"
Touma goes to Russia not to stop war but rather to save Index by destroying the index remote control carried by Fianmma.
Lessa is trying to seduce Touma to the best of her abilities.
The two goes and meet leader of country of Elizalina, which recently became independent from Russia. When they do, Fianmma strikes. Vent comes in as well as Sasha, but she is taken by Fianmma after the battle. Capturing Sasha was his real objective.
Accel is on the run from academy, and is attacked by Misaka Worst. He's hesitant to take her down in fear of killing her, because she reminds too much of LO. When MW threatens to kill LO (seeing how she's not doing much to Accel), he snaps, turns her into pile of meat. He goes psycho after this. This was Acdemy city's plan all along, to drive Accel into madness. Accel tries to rebuild MW(?), he somehow succeeds, and finds Touma passing by and what tsunade said follows.
Touma left him a note after the fight telling Accel to go and find Index probably because he shattered a spell or whatever which was cast on LO.
Pope is back on his feet.
Mugino is also going to Russia to see Hamazura. lovely.
Kazagiri heads to Russia via angel mode after having a conversation with Klause (sp?).
Index goes berserk again, and Stail is trying to stop her.
and Vent is a she.
by bob400