Ice Knife 5e: Attack Roll, Explosion, and Scaling

I enjoy Ice Knife when enemies bunch together because one 1st-level spell can threaten several creatures at once. The tradeoff is friendly fire: the shard explodes whether the initial attack hits or misses, and it does not spare allies standing nearby.

Ice Knife 5e — Quick Spell Reference

How Ice Knife Works

Choose one creature within 60 feet and make a ranged spell attack. On a hit, the target takes 1d10 piercing damage. Hit or miss, the shard then explodes. The original target and every creature within 5 feet of it must make a Dexterity saving throw, taking 2d6 cold damage on a failed save and no cold damage on a successful one.

The explosion is not dependent on the attack hitting. The primary target makes the Dexterity save along with every other creature in the burst. Allies are not excluded automatically.

One Spell, Two Damage Rolls

Ice Knife resolves in two parts:

1. The ranged spell attack can deal 1d10 piercing damage to the selected creature.
2. The explosion can deal cold damage to the selected creature and every other creature within 5 feet of it.

These parts are independent. Missing the attack prevents only the piercing damage; it does not cancel the explosion. Likewise, a creature hit by the knife still rolls the Dexterity save and can avoid all of the cold damage.

Positioning and Target Choice

Ice Knife is strongest when several enemies stand within 5 feet of the primary target. Because the burst affects every creature in that area, pick the target carefully to avoid friendly fire. The initial attack can critically hit, doubling only the attack’s 1d10 piercing damage dice. The explosion uses saving throws and is not doubled by that critical hit.

The spell is instantaneous and creates no lasting patch of ice or difficult terrain. It does not ignite objects or produce additional environmental effects unless the DM decides that the surrounding fiction calls for something beyond the spell’s rules.

Because the spell begins with a ranged spell attack, making that attack while an enemy is within 5 feet of you normally imposes disadvantage—even if that nearby enemy is not the target. Cover can also affect the attack roll. The explosion then uses Dexterity saving throws rather than the result of that attack.

Casting at Higher Levels

When Ice Knife is cast with a spell slot of 2nd level or higher, the cold damage increases by 1d6 for each slot level above 1st. The piercing damage remains 1d10, and the spell does not gain a larger range or burst. A 2nd-level slot therefore produces 3d6 cold damage, a 3rd-level slot produces 4d6, and so on.

Sorcerer Metamagic

Empowered Spell can reroll eligible damage dice, and Distant Spell can increase the spell’s range. Ice Knife is not eligible for Twinned Spell under the 2014 rules because the spell is capable of affecting more than one creature. Quickened Spell can change its casting time to a bonus action, subject to the normal bonus-action spellcasting rule.

Careful Spell can protect selected creatures from the explosion by making them automatically succeed on its Dexterity save. Because a successful save takes no cold damage, this is a useful way to protect nearby allies. It does not prevent the piercing damage if a protected creature is also the target of the ranged spell attack.

Spellcasting Ability

Use the class’s spellcasting ability for both the ranged spell attack modifier and the Dexterity saving throw DC. The caster’s own Dexterity score does not determine either value.

FAQ

Does the knife explode if the attack misses?

Yes. The shard explodes whether the ranged spell attack hits or misses.

Does the original target make the Dexterity save?

Yes. It is within 5 feet of itself and is included among the creatures affected by the explosion.

Does a critical hit double the cold damage?

No. A critical hit doubles the damage dice attached to the spell attack, so the piercing damage becomes 2d10. The cold explosion is resolved with saving throws and is not part of the critical hit.

Can Ice Knife be cast as a ritual?

No. It has no ritual tag and always uses a spell slot.

Does Ice Knife scale with character level?

No. It gains 1d6 cold damage for each slot level above 1st; it does not scale automatically with character level.