Medieval Portal

Youre an adventurous young soul, and when you stumble over a cave in your gorest, you become curious. In there, there is the ancient Medieval Portal. You thought it was a Myth but now you stand in front of it. It will bring you to a medieval world in another universe, where magic creatures anf magic exists. While youre in there, time in the real world doesnt move so you can be in there for years and come ba k the second you left, but you cant bring anything with you thats not natural in your world. Will you step inside? (You cant die in there)