Instead, Cole tries to provoke the sisters to kill him by sending an assassin after them, knowing that they will be able to recover thanks to their recent contact with Paige's father, whitelighter Sam Wilder (Scott Jaeck). He is distraught to learn he cannot be killed, and is pushed over the edge into insanity. Cole reverts to malevolent means of winning Phoebe back, striking at the Charmed Ones in various underhand ways over several episodes. In "Charmed"s 100th episode "Centennial Charmed", Cole accepts the Avatars' offer and uses their powers to create an alternate reality where Piper and Phoebe never met Paige, who was instead killed by the Source before the Elders discovered her. In the new reality, Cole is once again Belthazor and no longer indestructible. He acts as the right-hand man of the Source and owns Halliwell Manor with Phoebe, but they are unhappy together. Paige however is accidentally brought along from the real world and teams up with Piper and Leo to destroy Cole. After convincing Phoebe to join their side, the Charmed Ones vanquish Cole for good.