Can you run 3 a legendary ocean and 3 forgotten temple of the deep in your deck?

Yes, you can run 3 copies of Legendary Ocean and 3 copies of Forgotten Temple of the Deep in your deck, as both cards do not have restrictions on the number of copies you can include. However, keep in mind that Legendary Ocean is a legendary card, meaning you can only have one copy of it on the field at a time. Therefore, while you can include 3 in your deck, you can only have one active at any given time.