Protective magical frost surrounds you. You gain 5 Temporary Hit Points. If a creature hits you with a melee attack roll before the spell ends, the creature takes 5 Cold damage. The spell ends early if you have no Temporary Hit Points.
Using a Higher-Level Spell Slot. The Temporary Hit Points and the Cold damage both increase by 5 for each spell slot level above 1.
You hurl a beam of crackling energy. Make a ranged spell attack against one creature or object in range. On a hit, the target takes 1d10 Force damage.
Cantrip Upgrade. The spell creates two beams at level 5, three beams at level 11, and four beams at level 17. You can direct the beams at the same target or at different ones. Make a separate attack roll for each beam.
Whenever a creature makes an attack roll against you before the spell ends, the attacker subtracts 1d4 from the attack roll.