Base of operations:
In 1566 Merlin hid his spell book, The Book of Eternity, from his half-brother Etrigan beneath an ancient roman temple. With the book was Sultan Suleiman's scimitar, enchanted by Merlin and buried in the sand like Arthur's sword Excalibur. Like Excalibur, only a brave and noble person could remove the scimitar from the sand [JLA Annual (vol. 1) #4].
1999: After an earthquake while working for the 'Red Crescent', Selma Tolon fell into the dungeon where she found the spell book and the scimitar [JLA Annual (vol. 1) #4].
The scimitar that Selma carries it source of her powers. The spell book she carries, Merlin's Book of Eternity, enables her to do magic. At the present the extent of her powers are undetermined.
post-crisis New Earth/Earth-0
JLA Annual #4 (2000)
Brian K. Vaughan
Country of origin: