Culled from the massive spell lists of 3e, here are some utilitarian spells that I thought maintained the old school vibe to expand spell selection in your B/X or B/X clone game.
Alarm (1st level Magic User)
Duration: 48 turns
Range: 20’ radius
Wards a 20’ radius area that alerts the caster whenever it is entered with an audible alarm. The caster may designate any number of creatures they can see at the time of casting who will not trip the alarm. The alarm will awaken sleeping creatures within 60’ but not creatures under the effects of the sleep spell. The alarm has a 1-in-6 chance of drawing a wandering monster.
Animate Rope (1st level
Magic User)
Duration: 2 turns
Range: 10’
The caster
may command a rope to coil, knot, loop, or even slither across horizontal or
vertical surfaces at a rate of 50’ per turn. The rope may be directed to
entangle a single creature within 5’. Entangled creatures cannot move but can
break free depending on their strength
- Normal human range: Creature can break free in 2d4 turns
- Magically augmented STR above 18: The creature can break free in 4 rounds
- Giant Strength: The creature can break free in 2 rounds
Chill Touch (1st level Magic
User)
Duration: Instant
Range: Object or creature touched
The spell
freezes whatever the caster touches.
- Casting on a liquid surface: Freezes a 15’ radius about 4’’ deep that can support human weight.
- Hit: The caster can hit a creature in melee without an attack roll or saving throw.
- Damage: The touch deals 1d8.
- Higher level casters: At 6-10th level deal 3d8 damage; 11th-15th level deal 5d8 damage. Casting on liquid surfaces at higher levels doubles the radius and depth at levels 6-10, and triples at levels 11-15.
Disguise Self (1st level Magic User)
Duration: 1 day
Range: 10’
The caster
can their appearance and the appearance of their equipment to that of a
similarly sized and shaped humanoid. Detect Invisible will reveal the
deception.
Feather Fall (1st level
Magic User)
Duration: 12 turns
Range: 10’
The creature
or object cast upon will fall at a constant rate of 12’ per minute (120’ per
turn).
- Casting on a flying creature: Feather Fall may be cast on a flying creature which renders it unable to fly for the duration. It will slowly descend to the ground at a rate of 2’ per round.
Grease (1st level Magic
User)
Duration: 6 turns
Range: 50’
Covers a 15’
radius of a solid surface in a slick layer of nonflammable grease.
- Within the area: All actions except crawling 5’ per round is impossible.
- Casting on a creature: Grease may be cast upon a creature, which must save versus spells. If the save fails, the creature is coated in grease and cannot move or hold onto objects. If the save succeeds, the spell’s effect coats the area around the target in a 15’ radius that the creature may attempt to escape (at the reduced movement rate).
Jump (1st level Magic User)
Duration: 1 turn
Range: 60’
The creature
cast upon can make a single leap with their next move that allows them to
travel 360’ (120’) in any direction.