Grind

Grind (グラインド, Grind) is a Venus-class Utility Psynergy that costs 2 Psynergy Points to use. It is only available to Adepts that equip the Grindstone (a gift from King Hydros of Lemuria), which, in a first for the series, can only be equipped by Venus Adepts. Since the Grindstone currently only appears in Golden Sun: The Lost Age, only Isaac and Felix can use Grind.

Grind is used to "Pulverize large objects," namely certain large, brown, stones. This Psynergy is required to depart from Lemuria and reach the overworld back through the Sea of Time, as well as to get from the eastern sea to the western sea through the Gondowan Cliffs. Other uses of this skill include grinding down a mound-shaped mass of ice in Mars Lighthouse so that the ice wall in the room below can be cracked and destroyed with Burst, and gaining full access to the earlier floor of Treasure Isle.