Mr. Holzoff and the Gaea Cliffs
Items:
Javelin, Elixir, Fire Armlet, Last Elixir (Megalixir), Speed Source, Enhance Sword
If you pass out on your first trip to Great Clacier, which is likely to happen, you'll end up in Mr. Holzoff's house at the base of the Gaea Cliffs. Listen to his story and heed his advice.
Tip:
Once you visit Mr. Holzoff, you can always return to his house to rest and save.
When you climbing the cliffs, you'll move between ledges. At each ledge, you need to raise Cloud's body temperature by repeatedly tapping the [ ] button. You must do this at every ledge to keep Cloud's body temperature around 37 degrees. If his body temperature falls below 26 degrees, Cloud passes out and awakens in Mr. Holzoff's house.
After the first setof cliffs, you'll reach a small cave. Take the left path after the first door, and then follow the trail to a small cliff with an ice boulder resting on the edge. Push the boulder off the edge to destroy the barricade that blocks the lower trail. Now return to where you veered off and continue to the next set of cliffs.
In the next cave there's a door and a chest you can't seem to reach. For now, head right and follow the trail to a room full of huge icicles. As you walk along the edge, you'll enter four battles. In each battle, there's a huge Icicle in the back row of the enemy ranks. Attack the Icicle until it breaks, then jump down to the room below after breaking all four Icicles. Now you can reach the door and chest that were previously inaccessible.
There's a Save Point just inside the next cave, so save your game and dip your hands in the adjacent pool if your HP and MP are low. Also, equip everyone with items that absorb or protect against both Fire and Ice spells. Just down the path, the party encounters a huge beast blocking an icy hall.
Boss Fight: Schizo
Schizo's right side is fire-based and its left side is ice-based, so casting Fire on the right side or Ice on the left side heals that side. To make matters worse, both sides of Schizo are inculnerable to Gracity. As you might expect, Schizo's right side attacks with Fire Breath and its left side attacks with Ice Breath, but both sides can also cast Quake 3 on the eitire party.
Start the battle by casting MBarrier and Regen on the team. Then have one of your characters case Ice 3 on Schizo's right side, while another character hits the left side with Fire 3. This should make short work of Schizo. Note that both heads get final attack that causes up to 1,000 points of damage. The team receives a Dragon Fang for taking care of Schizo.
You've reached the summit! Climb the last cliff outside and see what Sephiroth is up to.