Acid Splash uses an attack roll rather than a saving throw to determine whether its acid projectile connects with the target. This means Fortitude, Reflex, and Will saves are not used to avoid the spell. The important defenses are instead the target’s touch Armor Class, any applicable spell resistance, and defenses against acid damage.

Acid Splash has no saving throw

The 3e version of Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ Splash lists no saving throw A stylized die roll icon representing a saving throw. D&D Portal - Saving Throw D20 test rule Saving Throw is a d20 test rule used to resolve uncertain outcomes during play. Full link: https://dnd-portal.com/rules/d20-tests/saving-throw/. The target therefore does not roll Fortitude, Reflex, or Will when the spell is cast.

There is also no special result for succeeding on a save, such as taking half damage, because there is no saving throw A stylized die roll icon representing a saving throw. D&D Portal - Saving Throw D20 test rule Saving Throw is a d20 test rule used to resolve uncertain outcomes during play. Full link: https://dnd-portal.com/rules/d20-tests/saving-throw/ to make.

The ranged touch attack determines whether it hits

Instead of allowing the target to make a save, Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ Splash requires the caster to make a ranged touch attack.

If the attack roll meets or exceeds the target's touch armor class A stylized shield icon representing Armor Class. D&D Portal - Armor Class Combat rule Armor Class is a combat rule used by attacks, damage, defenses, or turn order. Full link: https://dnd-portal.com/rules/combat/armor-class/, the projectile hits. If the attack misses, the spell deals no damage.

This is why Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ Splash should not be treated like an area spell that automatically affects a target and then allows a saving throw A stylized die roll icon representing a saving throw. D&D Portal - Saving Throw D20 test rule Saving Throw is a d20 test rule used to resolve uncertain outcomes during play. Full link: https://dnd-portal.com/rules/d20-tests/saving-throw/ afterward.

There is no half-damage result

Many damaging spells use a saving throw A stylized die roll icon representing a saving throw. D&D Portal - Saving Throw D20 test rule Saving Throw is a d20 test rule used to resolve uncertain outcomes during play. Full link: https://dnd-portal.com/rules/d20-tests/saving-throw/ to determine whether a target takes full damage, reduced damage, or no damage.

Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ Splash does not work that way. Its normal result is much simpler: the ranged touch attack hits and the spell deals 1d3 A twenty-sided die icon representing the dice roller. D&D Portal - Dice Roller Roll your dice Roll standard or custom dice with adjustable count, faces, advantage, and disadvantage. Full link: https://dnd-portal.com/dice-roller/ Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/, or the attack misses and the spell deals no damage.

Saving throw bonuses do not directly help against Acid Splash

Because Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ Splash never calls for a saving throw A stylized die roll icon representing a saving throw. D&D Portal - Saving Throw D20 test rule Saving Throw is a d20 test rule used to resolve uncertain outcomes during play. Full link: https://dnd-portal.com/rules/d20-tests/saving-throw/, bonuses to a creature's Fortitude, Reflex, or Will saves do not directly improve its chances of avoiding the spell.

Other defenses may still matter. A higher touch armor class A stylized shield icon representing Armor Class. D&D Portal - Armor Class Combat rule Armor Class is a combat rule used by attacks, damage, defenses, or turn order. Full link: https://dnd-portal.com/rules/combat/armor-class/ can cause the attack to miss, spell resistance can stop the 3e version of the spell after a successful attack, and Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ resistance or immunity can reduce or prevent the damage.

Spell resistance is separate from a saving throw

The fact that Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ Splash has no saving throw A stylized die roll icon representing a saving throw. D&D Portal - Saving Throw D20 test rule Saving Throw is a d20 test rule used to resolve uncertain outcomes during play. Full link: https://dnd-portal.com/rules/d20-tests/saving-throw/ does not mean every successful ranged touch attack automatically damages every creature.

In D&D 3e, Acid A stylized corrosion icon representing acid damage. D&D Portal - Acid Damage type Acid is a damage type used by attacks, spells, class features, resistance, immunity, and vulnerability. Full link: https://dnd-portal.com/rules/damage-types/acid/ Splash is subject to spell resistance. A creature with spell resistance may therefore still prevent the spell from affecting it even after the caster has successfully hit its armor class A stylized shield icon representing Armor Class. D&D Portal - Armor Class Combat rule Armor Class is a combat rule used by attacks, damage, defenses, or turn order. Full link: https://dnd-portal.com/rules/combat/armor-class/.

This distinction is especially important when comparing the 3e and 3.5e versions, because the later 3.5e version no longer allows spell resistance.