Thor's Day: Celaeno Fragments for D&D 5th Edition

CELAENO FRAGMENTS 

Wondrous item, artifact (requires attunement by a magic user)

• As a bonus action, you may open a portal to Celaeno, a distant planet that contains a huge library of alien literature.  The portal is 10' x 10' and ends when you will it.
• You may cast the gate spell once per day.

• You may cast the dispel good and evil spell twice per day.

• You may cast the dominate monster spell twice per day.

• You may cast the dominate person spell twice per per day.