WoWDB

Rank 1: Overcharge your mana for 8 sec, causing each spell you cast to increase your healing by 3%, stacking.

While overcharged, your mana regeneration is halted.

Rank 2: Healing bonus per stack increased by 1%.

Rank 3: Additionally grants 10% haste while active.

Rank 4: The Ever-Rising Tide gains an enhanced appearance.

Rank 1: Your heals have a chance to grant either 0 Intellect for 10 sec or 0 mana. Chance of receiving mana increases with your missing mana.

Rank 2: Both effects are increased by 20%.

Rank 3: 20% chance to gain both effects.