I am wondering why /cast is case sensitive. I realize that the spell might be Summon Missile but /cast summon missile should also work.
They seem to be working on the mobs, I was able to fight a consumer near the big mouth but only with magic as standing on top of it I was "Too far away to attack". After I killed it with Summon Missile I took this pic when it respawned.
When I originally approached it it was on the ground and no others were nearby. After it respawned I saw two others one of which fell out of the sky several times.