Alpha Omega Management has announced via their Official Facebook Page the following:

We are delighted to announce that the Swedish melodic death metallers ENGEL are confirmed to headline Krock Festival, set to take place on June 18th, 2015 in Kherson (Ukraine), co-headlined by the Italian Vampire metallers MANDRAGORA SCREAM, featuring on drums The One and Only Nick Barker (Cradle of Filth, Dimmu Borgir, Lock Up, Brujeria, Benediction,Testament, Gorgoroth, Ancient, etc).

ENGEL guitarist Marcus Sunesson comments:
It’s the first time for us in Ukraine so we are very excited to come play some metal for you all! It will be epic!

https://www.facebook.com/Engel.Propaganda
https://www.facebook.com/MandragorAScreaMOfficial

More information on Krock Festival:
http://www.fkrock.com.ua/
https://www.facebook.com/groups/122579761117980