Stillness of the mind, clairvoyance/clairaudience and other psy abilities at the very least.
Intuition, like your own personal helper, think of KITT from knight rider or Jarvis from Iron Man.
All the goodies you’d pick along the practice of your choosing, especially the healing and wisdom of the sages and mystics.
And my personal favorites, shadow work and ego death. Your horizon will truly expand, no longer sticking to the limited perception of our eye sights