The idea is making a good defensive tool, as it should be. So my suggestion is making the simple way to balance and make it good: negate 2 dmg instead of 1. Why? Because it is a pose. Stubborn negates 1 damage by dashing (something that you already do normally) and adamant negates 1 dmg when you hit your structure on your opponent or you (again, you will attack anyways, so it doesnt charge your playstyle). But guard, you need to do an action, so you are not attack, either dashing, you are guarding. Ex: your opponent with stubborn will do dash + attack = defend and you will do dash + guard = defend. Seems quite unfair, since guard is a shield to actually protect you. Why negating 2 dmg will be balanced and good for other shiftstones? You can run other shiftstones for synergize, since its a good stone for it without locking you hard: Charge/Vol/Flow + Guard: meta stones + a good defense against tip damage Adamant/Stubborn + Guard: you will do 2 actions (Attack + Guard or Dashing + Guard) to prevent a cube, one of the strongest structure to pace Vigor + Guard: vigor will be rlly strong, since you will heal 2 dmg and maintain with guard, making you hard to die