Cyber Legs (4e Future Technique)
From D&D Wiki
Your legs and hips are enhanced for strength and balance.
Benefit: You gain a +5 bonus to Athletics or Acrobatics checks made when entering challenging terrain
Overcharge: When you walk or run, you can roll a d20.
♦10+: You increase your Speed by 2 for that action.
♦9 or less: You are slowed (save ends).