Armor of Spikes
Whenever your General takes damage, deal that much damage to the enemy General
Honestly I don’t know how to name it or which faction to give it to, so I named it the first I came up with. I feel like it fits into several factions; I’d say it will be good for Maehv, but Aby is my main, after all.
I think artifact like this would be interesting because of its utility - you can equip it to try to delay some face damage or you can use it to directly damage the opponent or just to break their equipment.
And if directly attaking the enemy General, it will work like +2 attack.