Water Ultima or Tsunami is the fourth most powerful and the most powerful water spell to be casted at RuneScape. It needs 13 Air runes, 17 Water runes, 1 Blood rune, 2 Death runes and an Alpha rune to cast and Alphans Quest to be finished. You also need to buy Supreme Magic Potion, which aids you to get 105 Magic (which the potion boosts by 21-20 points). Beware, you will get 500 damage when drunk, and adds 200 more damage when drinking the second dose, 250 at the third, and 350 at the last dose (1300 altogether). Although this spell is very expensive, this can spawn 3 surges of water then followed by Snare. Its maximum damage is 1008.