Instructions
Navigate to a "SlashScape" private server site, register for the site/forum, then log into the "SlashScape" server with this username and password. You'll be given an option to create a new character or continue as a previous character. Select one to begin playing.
Exit the spawn point (your house) and head toward the bank in town. To the right of the bank is the Altar. Click on the lectern and select "Ancients Spellbook."
Open your inventory and click the Ancients spellbook to open it and learn the spells within. Because the Ancients spells are the most powerful in the game, some "SlashScape" servers actually disable the use of Ancients spells for player versus player combat.