Tidal Power is used to empower Water Burst, Dehydrate, Water Jet and Geyser. You can have up to three stacks of Tidal Power at a time. Using Water Burst at 3 stacks of Tidal Power gives 100% chance at Mag +0.67 to Knockback to all affected targets. Using Water Burst at 2 stacks of Tidal Power gives 70% chance at Mag +0.67 to Knockback to all affected targets. Using Water Burst at 1 stack of Tidal Power gives 45% chance at Mag +0.67 to Knockback to all affected targets. Using Water Burst without any stacks of Tidal Power gives 33% chance at Mag +0.67 to Knockback to all affected targets.