The Bird With Batrachotoxin
Core 'Shroom Staff
Now that you have Vruet's permission, you have Doomhiker use the Bowser suit to blast Dupe Face's naked corpse with a stream of fire. His burning is not as severe as Nitwit's and is much more evenly distributed across his whole body.It seems that Vruet is in possession of Dupe Face's corpse. You would need his permission to use it for these purposes.
In the Starry Gardens, you find Vruet sitting, with Dupe Face's now-charred corpse in his hands, among the now-wilted flowers which once resembled Toady and Coffee. The flowers are covered in vomit. Near the Eastern Wall of the castle, underneath the Eastern windows of the Flipswitch Room and Shrinking Tiles room, is a creepy-looking but normal wooden doll surrounded by shards of glass.Investigate the Starry Gardens and the "doll"