Ice Blitz requires a Magic level of 82. This spell can freeze your target, immobilising it for 15 seconds, and is capable of hitting up to 26 (29 if you are wielding a staff of the dead).
As with all Ancient Magicks spells, it can only be cast using the Ancient Magicks spellbook unlocked by completing the Desert Treasure quest.
This spell is commonly utilised by player killers who intend on "rushing" another player. These type of player-killers would often cast Ice Blitz, followed up by three hits using a granite maul (1 regular hit and 2 special attack hits). The Ice Blitz has a delay of a few seconds before hitting the player, allowing rushers to potentially land four (4) high-damaging hits on another player.
Ice Blitz has the same accuracy as Ice Barrage against one target.
Remember, you cannot use Lunar spells, Standard spells, or Arceuus spells if you are using Ancient Magicks.