"Alright... Number Nine... Mountains... Towering peaks, steep cliffs, deep valleys... all empty... The terrain goes from forested foothills to barren rocky slopes to snow-capped summits... Each level brings different challenges...

The altitude matters here... Climb high enough and the thin air makes everything harder... Your stamina drains faster, breathing becomes difficult... It's not like the flat environments where you can go forever... The mountains test endurance in ways the desert or tundra don't...

Weather gets extreme up here too... Clear skies at the base can turn into howling winds and storms at the peaks.. .Avalanches are possible in snow-covered areas...And at night, if it's clear, the stars above the mountains are incredible...

You've got caves to explore, cliffs to climb, narrow ridges to traverse, valleys to descend into... Loose rocks, unstable footing, waterfalls, streams... It's dramatic terrain that reacts to whatever you throw at it...

Same as always—adjust time and weather, summon opponents if you want, train however you need to... Just remember: the higher you go, the harder it gets...

Now then... do your thing... Enjoy!"