Let me start by wishing you all a fantastic new year as I give you the instructions to eliminate the confusion of abilities in this world of Guns x Magic.
Warning, spoilers from volume 8 to latest volumes;
Aine's abilities gifted to him by Thomas[Dismantle Bullet, Faint Bullet, Light Bullet, Time Stop Bullet, Time Start Bullet, Heal Bullet]
Pure Blood Demons of Zerin[Demon Blaster, Demon Killer, Demon Moon, Mind Control(Not a demon's ability, from the pain witch) , Demon Break.]
Pure Blood Demons Advanced Abilities[Blood Slash, Blood Killer, Blood Moon, Blood Control, Blood Break.]
Artificial Demons/High Demons/Croters[Can have any power given the blessing received from the Blood Moore Mountain after being reborn and turned from humans to demons.] They are the strongest beings on earth abd hold true military might. They are 'The Empire of Crote.'
World Abilities(Granted to those equally strong with the world/planet) [Domain ; All abilities in the domain are conjured up by the world.]
CRITICAL KNOWLEDGE :
By the way, Thomas's full abilities to their extent [Unknown even by the author.] Undoubtedly the strongest character for those who have caught up with the story.
A/N : If I have forgotten any ability, please remind me.