Update dark druid model

[DiamondWalker]

Hello,
The dark druid model looks cool, but something about it makes me feel like it doesn't match the other betweenlands models. I'm not an artist by any means, but I think it might look better if the bottom of the robe used fewer, sloped boxes rather than voxels. The other betweenlands models do it this way, and the flat cubes made me think it was a slug.

I'm not saying this to complain; I just think updating this mob was forgotten since it isn't part of the dimension😄.