Here's your chapter 5 FRIEND-posessed asgore boss, who will be both the final normal boss AND the crystal holder.

Chapter 5 FRIEND-posessed Asgore will look like this

>>530107469
He will be possessed by FRIEND and look like this with added yellow and pink eyes. Asgore is the Friend Inside Me boss .

Will possibly die after unless you did some detailed side stuff like potentially completing the 5 Shadow Crystals and fighting Seam