FOund a list from back in the day....
http://jeff.lumacs.net/ShamanSpells.html
chk out lvl 19!
Now i know this was a controversial spell, due to misuse by players.
discussion on list here...
http://www.eqclassic.org/forums/viewtopic.php?t=1079
not sure about the lvl 50 spell. never heard of it before.(or since)