Golden Egg #88 is hidden on Ragnahog Level 21. The video below is in two parts, first we get the egg and then we clear the level.
The egg is hanging out in the snowballs to the right of the sleigh. Keep hammering away and you’ll see it peeking out from the bottom right snowball, bomb it with Matilda to release the egg and open the level.
Apparently the Vikings developed anti-gravity as well. First throw Stella low to the horizontal stone plank, which is containing a floating stone and the anti-gravity ray. Next, a well timed toss of red enters the ray, travels upward, and bounces off the stone, following through to the detonator up high. The axe falls and wipes out most of the structure below. The rest is blown to bits as things start shifting and the TNT goes. When the dust settles, with 4 bonus birds for 40K, the score is 143850.