Earth 2 # 2: The Tower Of Fate (New 52)

The World Army has begun rounding up the super-heros of Earth 2, but for
what reason? In an attempt to avoid capture, Dr. Fate and Kid Flash find
themselves in the powerful magical realm of Nabu. The protector of Nabu, Wotan,
seeks Dr. Fates assistance in obtaining a secret magic locked deep within a
tower that only Dr. Fate can enter.
Collects issues #7-10 and #0 of the original series.