Merging / Conjoined Mouth - For illustrious

Living Arms / Sentient Arms / Arm Transformation - For Illustrious

Fused Taur / Conjoined Taur for Illustrious

Conjoined At Midsection/Queenjoinment - Illustrious - Furry

Two conjoined faces

Two Heads / Conjoined (Hunyuan Video)