Cryonis

Choose a 10 foot square of water you can see within 120 feet of you and spend an action. A 14 foot tall pillar of ice rises from the surface of this water, remaining stationary even if the water is moving. The sides of this pillar are rough and easy to climb. The pillar persists for one minute, until it takes any fire damage, or until you destroy it as a bonus action, at which point it melts into water. Also, if you create a fourth pillar, the oldest pillar of the current three melts into water. You must use two hands to activate this rune or to destroy a pillar, but the pillars persist even while you are not holding the Sheikah Slate.