Izek's Oversized Arm

What we know

Izek's enlarged right arm—possessed, fire-breathing per Wilhelmina Rikalova (Session 10 @ 01:04:01)
Sildir severed the arm as proof of Izek's death after lake ambush (Session 15 @ 04:34:38)
Proof required for Lady Fiona Wachter's coup against Baron Vargas Vallakovich (Session 14 @ 02:07:45)
Arm proof not delivered until morning 8th—severed hand delivered to Fiona at St. Andral's Church (Session 18 @ 02:45:50)
Fiona scheduled coup for Festival 9th after receiving proof (Session 18 @ 02:47:06)

Udo woken with severed arm at Party Hideout before delivery (Session 16 @ 00:18:10)