I always felt 4e did at-will magic right. Instead of magic being little more than a reflavored crossbow, at-will spells in 4e often did a variety of interesting things that no weapon user could ever hope to replicate. I feel 5e would be better if the at-will magic was spiced up a little bit. So here are some conversions of my favorite 4e wizard at-will spells to 5e cantrips.
Storm Pillar
Casting Time: 1 action
Range: 50 ft
Duration: Concentration, up to 1 minute
Choose a point within range. You call forth a colum of lighting in a 5 ft radius cloud centered on that point. Each creature that moves into or ends its turn within the cloud takes 1d6 lightning damage. A creature can take this damage only once per turn.
At higher levels: This spell increases in damage as you gain levels. This spell does 2d6 damage at 5th level, 3d6 at 10th level, 4d6 at 15th level, and 5d6 at 20th level.
Winged Horde
Casting Time: 1 action
Range: 50 ft
Duration: Instantaneous
Choose a point within range. You create an illusionary horde of winged phantasms that begin attacking your foes in a 5 ft radius cloud centered on your chosen point. Each creature in the cloud must make an Intelligence saving throw or suffer disadvantage to all actions and be unable to take reactions until the end of your next turn.
Howling Wall
Casting Time: 1 action
Range: 50 ft
Duration: Concentration, up to 1 minute
You create a 30 foot long, 10 foot high, 5 foot wide wall of wind within range. Attacks made through the wall suffer disadvantage. The wall counts as difficult terrain and all creatures attempting to pass through the wall must succeed at a Strength saving throw or have their movement halted.
Freezing Burst
Casting Time: 1 action
Range: 50 ft
Duration: Instantaneous
Choose a point within range. You create a freezing whirlwind that affects all creatures in a 10 ft cloud centered on that point. All creatures in the area must make a Dexterity saving throw of suffer 1d4 cold damage and be slid 5 ft away from the center of the cloud.
At higher levels: This spell increases in damage as you gain levels. This spell does 2d4 damage at 5th level, 3d4 at 10th level, 4d4 at 15th level, and 5d4 at 20th level.
Hypnotism
Casting Time: 1 action
Range: 25 ft
Duration: Instantaneous
Choose a creature within range. That creature must succeed at a Charisma saving throw or be charmed by you until the start of its next turn. While charmed, you may choose how the creature uses its reaction.
Obscuring Cloud
Casting Time: 1 action
Range: 50 ft
Duration: Concentration, up to 1 minute
Choose a point within range. You create a 10 ft radius cloud of darkness (smoke, fog, etc) that heavily obscures all creatures within. Any attack made into or out of the cloud suffer disadvantage.
Storm Pillar
Casting Time: 1 action
Range: 50 ft
Duration: Concentration, up to 1 minute
Choose a point within range. You call forth a colum of lighting in a 5 ft radius cloud centered on that point. Each creature that moves into or ends its turn within the cloud takes 1d6 lightning damage. A creature can take this damage only once per turn.
At higher levels: This spell increases in damage as you gain levels. This spell does 2d6 damage at 5th level, 3d6 at 10th level, 4d6 at 15th level, and 5d6 at 20th level.
Winged Horde
Casting Time: 1 action
Range: 50 ft
Duration: Instantaneous
Choose a point within range. You create an illusionary horde of winged phantasms that begin attacking your foes in a 5 ft radius cloud centered on your chosen point. Each creature in the cloud must make an Intelligence saving throw or suffer disadvantage to all actions and be unable to take reactions until the end of your next turn.
Howling Wall
Casting Time: 1 action
Range: 50 ft
Duration: Concentration, up to 1 minute
You create a 30 foot long, 10 foot high, 5 foot wide wall of wind within range. Attacks made through the wall suffer disadvantage. The wall counts as difficult terrain and all creatures attempting to pass through the wall must succeed at a Strength saving throw or have their movement halted.
Freezing Burst
Casting Time: 1 action
Range: 50 ft
Duration: Instantaneous
Choose a point within range. You create a freezing whirlwind that affects all creatures in a 10 ft cloud centered on that point. All creatures in the area must make a Dexterity saving throw of suffer 1d4 cold damage and be slid 5 ft away from the center of the cloud.
At higher levels: This spell increases in damage as you gain levels. This spell does 2d4 damage at 5th level, 3d4 at 10th level, 4d4 at 15th level, and 5d4 at 20th level.
Hypnotism
Casting Time: 1 action
Range: 25 ft
Duration: Instantaneous
Choose a creature within range. That creature must succeed at a Charisma saving throw or be charmed by you until the start of its next turn. While charmed, you may choose how the creature uses its reaction.
Obscuring Cloud
Casting Time: 1 action
Range: 50 ft
Duration: Concentration, up to 1 minute
Choose a point within range. You create a 10 ft radius cloud of darkness (smoke, fog, etc) that heavily obscures all creatures within. Any attack made into or out of the cloud suffer disadvantage.