Cutting Edge Research

Hideaway 5 (When this enchantment enters, look at
the top five cards of your library, exile one face down,
then put the rest on the bottom in a random order.)
When Cutting Edge Research enters, you may
sacrifice a creature. When you do, investigate.
Sacrifice Cutting Edge Research and 4 artifacts:
Play the exiled card without paying its mana cost.
Activate only as a sorcery