>>3025449Controlnet will let you transfer the horns in their current position only. And it's just three nodes, load image (that's your reference), load controlnet (that's your CN model) and apply controlnet (that's where you set the strength and start/end step. You can right-click the load image node and draw a mask so that it only affects a small area, not the whole image.
Workflow
https://litter.catbox.moe/x5oxo42ppzlswhs2.png So I'm guessing you want IP-Adapter, which is weaker and unreliable but will allow the horns to move elsewhere in the pic, turn around, etc.