[@KatherinWinter]Hit him hard enough. Continue stabbing him so he will lose concentration from pain. Keep him in shadow realm alone so he calms down. Call a break. Use shadows to affect brain. Summon beast in front of him - he can absorb only one thing. You forgot about second panther. Notice that it took him several seconds to somewhat recover from backstab. Strong god presence breaks absorbtion. Get creative. It was you who have chosen this power, so put it to use. Shadow bonds, field of darkness, projectiles, shadow illusions, teleportation, incorporeal mode. I gave you my limitations, exploit them. Think about cosequences of your actions - why drag him into shadow realm if it perfectly covers your presence? I don't have a way to overcome this ability and can only rely on endurence, and you gave me an out yourself. Keep distance - he is not so fast to catch you, even in overcharged mode.