Sometimes referred to as LAT is one of the most expensive currency's in the game. You can only obtain this token through donating a certain amount in the donation shop. The Living Archlight Token is also used to purchase rare items at Living token Exchanger at the ground level of the depot.

So if anyone ever refers to LAT, they mean a Living Archlight Token.

Is the main trading currency in the game, and used in the market to buy and sell items. You can access this through the depot. Make sure you buy and sell in AT, not gold! Don't rip yourself off.

If somebody says AT: they mean Archlight Token.

Archlight Tokens are obtained through Personal and Greater Dungeons, Story Quests group and solo, Arena, Ritual Lords, Etc.