After they willingly target accepts the amulet their alignment will slowly fall into the evil alignment of their sub alignment. This process takes approximately 10 days in game (Chaotic good will become chaotic evil)
They will find less attraction to their current god if they have one and find that worshiping Asmodeas is more beneficial. If the holder prays to asmodeas they gain a +1 to their AC and a +5 temporary hit points per day.
If the character passes a DC 15 investigation on the amulet they discover what it is doing but are unable to tell anyone about it.
A character much succeed 1 wisdom save (DC 15) 3 days in a row to rid themselves of the amulet. If the target fails its throw or misses a day the counter resets. On the 3rd successful save the amulet turns to dust and the affected target forgets that they had the amulet at all. On a failed save the amulet strengthens its grip on you and add 2 days to your alignment counter.
If the holder reaches their evil alignment or accepts asmodeas as their god, they gain the summon celestial spell. The DM rolls the celestial from the table below.
1-10 abyssal chicken
11-20 Quasite
21-25 night blade
26-30 war horse skeleton
31-40 imp
41-50 gelatinous cube
51-60 reaper of bhaal
61-70 bearded devil
71-79 frog
80-93 succubus
94-100 Godskin
Notes: Bonus: Hit Points, Bonus: Armor Class