Hook Daiichi 2460 or similar 4X-long streamer hook, two hooks articulated, #2-1/0 (front), #2-4 (rear)
Thread match body (olive, white, or black) GSP 100-200 (needs to spin deer hair)
Materials
Rear tail Marabou (1-2 plumes, one shank length)
Flash Flashabou (6-8 strands each side)
Rear body Ice Dub or UV Polar Chenille (small pinch)
Body hackle Schlappen (2 feathers)
Legs Barred rubber/Crazy Legs (2-3 per side)
Connection Senyo wire or 20lb mono (1 loop with bead)
Eyes Lead dumbbell eyes (1 large pair)
Head/collar Deer belly hair (2-3 stacked clumps)
How to tie it
REAR HOOK: lay a smooth thread base to the bend and tie in a marabou tail one shank length long, then add 6-8 strands of Flashabou down each side for lateral flash.
Dub a short body of Ice Dub forward, then tie in and palmer two schlappen feathers as a full collar; splay 2-3 rubber legs per side and whip finish.
FRONT HOOK: run a wire or heavy-mono loop through the rear hook eye, thread a bead onto it, and lash the loop firmly along the front shank so the rear hook articulates freely.
Tie in a marabou skirt with flash over the connection, then palmer a schlappen collar and add rubber legs, building bulk as you move forward.
Lash a large pair of lead dumbbell eyes on top near the hook point so the fly rides hook-up and jigs.
Spin 2-3 stacked clumps of deer belly hair to form a broad head, packing each clump tight before adding the next.
Whip finish behind the eye, then trim the deer hair flat on the bottom and blocky on top so it pushes water and gives the classic Dungeon wobble.