The actual description just tricks me (not native E-Speker) because it seems that the two effect are linked and applied one after another without an interruption. However, as someone explained me in the game chat, this ability can Ensare and Confuse all the enemy champions because Psychic Anguish CAN apply Soultapped before the full effect of Agony is resolved. So, in my opinion, the description should be changed from: "The first time this champion falls below 50% HP, enemy champions take 5 Psychic damage. If the champion is Soultapped, it becomes Ensnared and Confused for 2 turns." to "The first time this champion falls below 50% HP, enemy champions take 5 Psychic damage. After the damage is dealt, each Soultapped enemy champion becomes Ensnared and Confused for 2 turns."
It's always been like that Btw. It's one of those things where the order in which things apply really make a difference.
