Originally Posted by Zahur
Originally Posted by mrfuji3
There is basically no cost to moving to high ground: you simply walk up some stairs/a ladder.

Now I realized that vertical movement doesn't even cost movement. It should cost extra movement and only with something like Athletic feat it costs normal movement. So going high-groud literally have no cost at all and you kinda get effect of 9th spell Foresight.

That's a fair point. The resources needed to get advantages should be significant.