The power says:
Daily Divine, Radiant
Standard Action Close burst 1
Target: Each enemy in the burst
Effect: Each target takes 10 + Wisdom modifier radiant damage, and you gain that number of temporary hit points. Until the end of the encounter, you gain a +2 power bonus to attack rolls
As the Dungeon master, I told my player the power says "that number" referring to the damage dealt to one enemy. He says its a 15 cleric level power and is potential should be 10 + Wis (9) = 19 * 8 enemies (assuming he has 8 enemies adjacent) = 152 damage and 152 temporary hit points..
Really too much in my opinion (I don't remember a power giving 150 temporary hit points...)
My simple question is: "that number of temporary hit points" means all the damage dealt to all enemies or 10 + Wis?