From LensWiki

Remort

The remort spells give your character the ability to ascend to a higher 
level of existence.

Only level 91 players are able to change their race to a new, more powerful 
one. There is also a remort option to retain your old race (Rebirth), while 
gaining improved stat maximums; it is otherwise treated exactly as any 
other remort option. 

Although you rise to a higher state of life, when you remort, it is not 
without its costs. Much of your previous training will be lost to reflect 
your unfamiliarity with your new body. You will only have one third of your 
previous skill level left (Genies are an exception), and will again start 
as level one. You will also lose all your unused trains, practices and 
quest points. It will also clear no-hunger and no-thirst if you have 
quested for them. 

If you have a pet, it will also be dropped to level 1. 

If you are level 91 and wish to remort, start exploring. All of the remort 
quests are in-game. 

And no, we won't give you any hints; this is supposed to be hard, silly!! 

Remort quests are permanent additions to a zone. This means, they're also 
Zone Quests. For those who aren't aware, it is illegal to ask for or give 
information about what a Zonequest is, or how to solve it. They must be 
completed separately, and completely by each person wishing to remort.

These spells are the remort spells. When cast, they will transform the 
caster into one of the remort races. Not all of these spells are learnt and 
cast; the power of some of these spells is worked into objects that must be 
quested for. 

Abandon  : Knaeli          Descend    : Demon
Advance  : Tautha          Draconis   : Dragon
Amplify  : Gilska          Preserve   : Liche
Ascend   : Angel           Transcend  : Genie
Awaken   : Shapeshifter    Rebirth*   : Rebirth
Bond     : Troll           Revert*    : Premort race

* Rebirth allows characters to remort as their current race, gaining 
improved stat maxes (+2), as well as internal bonuses to their HP and Mana, 
and new leadership capabilities. They will be allowed to play a member of 
their same race. Otherwise, being reborn is the same as remorting as a new 
race; it can only be done once. 

* Revert allows a level 91 remort character to return to their original 
premort race at level one. Revert does not give any +stats, but will allow 
you to remort again at 91, if you so choose. Reverting can be done multiple 
times.