I think it would be best for heroes to reach that place naturally, i.e., after death. If a hero is killed in battle, they go to heaven, and the Valkyries take them there (instead of them returning to the tavern). Living heroes have nothing to do there, except perhaps to communicate with the spirit of the deceased through some kind of magical window. And let dead heroes populate heaven and fight with other dead heroes from the enemy.
Great idea. But you could also create special portals for teleporting to the top for a short time, and then returning to the portal.
Многие их ищут, многим они вовсе не нужны, а многие даже не замечают их, не понимают что они вокруг нас, каждый день, везде.
А эти чудеса порой, сокрыты в обычных, привычных предметах.