[Magiclysm] Obsolete shambling mound, give shaman the Keeper of the Glades summon

[Standing-Storm]

Summary

Mods "[Magiclysm] Obsolete shambling mound, give shaman the Keeper of the Glades summon"

Purpose of change

The Magiclysm design docs say

Tanky Summon - Keeper of the Glades.

An ancient forest spirit in the guise of a moose of bark and leaves. Will help you fight "unatural" foes, and can be ridden.

Right now they have the Shambling Mound, but 1) the shambling mound does not exist anywhere except as a spell summon, there's still has a TODO of adding spawn and drops and 2) the existing brackenwight (which does have spawns and drops) is very similar as an animated pile of leaves and vegetable mass.

Describe the solution

Obsolete the shambling mound.

Add the Keeper of the Glades:

An enormous stag with a body made of wood and vines, this is the king of the forest. Its ivy-wreathed horns bloom with flowers and grass grows with every step that it takes. Two luminous green eyes gaze at its surroundings.

The keeper can gore with its antlers, hit with its hoof (causes root slow), use vegetative grasp, and also cause zombie flesh to rapidly decay and banish Nether creatures back to the Nether. They very rarely spawn in the forests and can also be summoned.

Hopefully I'll be able to let the shaman ride them too.

Describe alternatives you've considered

Testing

Keepers of the glades can really do a number on zombies, rotting whole groups of them to nothingness in seconds, but they'll only do it in the wilderness (i.e., outdoors and away from roads). They're much less powerful in the cities, though they're still very tanky and can slow anyone they hit. But in the wilderness:

(That's the keeper slaughtering a group of zombie predators)

They can also destroy Nether creatures with a glance, as long as both the keeper and their target are on diggable ground:

Mounting doesn't work but I'm not sure why--the option simply doesn't appear (even though the warning that I need Survival 1 or higher to ride an animal does if I don't have the proper skills).

Additional context

I should make a "hidden glade" special that's like a magic meadow but in the depths of the forest.