Talad's words, IIRC:
"We need more glyphs that use GM powers"
1.
Junk is supposed to vanish on its own. A glyph for such a function is totally unnecessary.
Hm.. What about a "disposal" spell? A spell that makes items simply vanish, like the dev command? It could teleport an item just outside of the stalagtite..
Of course it should give a warning before disposal of important items, used for quests for instance, with the warning "you have a bad feeling about that, maybe you shouldn't do that." And too big items like armor or swords: "that item is too big to dispose that way".
2. About the disappearing/reappearing spells:
Actually this should be very easy to do. The spell could create a nice animation for the other clients while "puffing", set the client invisible for 10 seconds while showing some nice sparkles and billowing on the client of the caster. The spellcaster-client could be in "ghostmode" in the meantime, meaning all collisiondetection off, no movement animation like walking or jumping, no physical limitations (no graphity for instance).
Another puff when the invisibility wears off.
If you don't pay attention, you reappear in a wall or falling off the world, or reappear in high air and fall down, so you need to pay attention where you "teleport".
It's not an instant teleportation (which I like to see in the future as well, over greater distances), but a shortrange one that allows moving through walls, jumping at unreachable places and such. It also doesn't allow faster movement than normal.
I consider that spell as pretty "idiot safe" with low abuse potential.
3. What about morphing spells? A morph glyph that, being combined, allows to /morph to a specific mesh. The bigger/more complicated the target creature, the more difficult it is to morph to that.
People will love to morph to yulbars and groffels

4. I heard about invisibility getting implemented soon (tm).. but there I see relatively big abuse potential. Thus I suggest working on an detection spell in parallel, get it implemented at the same time as invisibility.
5. Also a pure RP spell could be one that changes the color of the crystal for a few minutes to another (fixed) one, without any other effect.
With that I see medium abuse potential. For instance when people try to change the color of the crystal repeatedly in a short time.
This abuse could be prevented by preventing other people from casting as long the spell works, also placing a long timeout after the spell stopped working (and maybe making it only possible to extend the last spell in that timeout-time, not casting another with another color).