Please Use this Mortal clip as Reference: General Tips:

• Hold R the entire time.

Steps:

• Jump on the arrow sign
• Single jump into the crevice between the pointy rock and the wall
• Once you get your double jump back, jump out then back in to get on top
• Hold cleanly left and jump to get on the invisible ledge
• Start charging in a left direction
• If you get stuck or fall be sure to keep on the darker part of the rocks or get back there by jumping
• When you're furthest left (keep going left until you can't anymore), jump on the invisible wall collisions until you're on the level's ceiling
• Run back where you came from but on top of the level
• There should be a little tunnel visible, jump onto that and go to the end of it.
• Run (not charge) and jump off of it in a clean left direction as far as you can go
• If you did it right you should have bypassed the death plane and be at the entrance to skull cliff 4