Tanner's 4E campaign
If you begin your turn standing on a solid surface, you can move across liquid as if it was normal terrain. If you are still on liquid at the end of your turn, you fall in.
Power (daily): Minor action. You can move across liquid surfaces as if they were normal terrain until the end of the encounter.
These greaves are used by the Wavestriders, the official navy of Port Sapphire.