You direct a bolt of rainbow colours toward a creature of your choice within range. If it hits, the target takes 3d8 damage of a random type (determined by rolling on the damage type table). If your attack roll was odd (the roll itself, not the adjusted result), the bolt leaps to a new target of your choice within range, and continues to leap until you run out of targets, miss, or roll an even number. All targets must be within range from you.
At 3rd level or higher, the damage increases by 1d8 per slot level above 2nd. Each target can be hit only once.
You psychically lash out at one creature you can see within range. The target must make an Intelligence saving throw. On a failed save, the target takes 3d6 psychic damage, and it can't take a reaction until the end of its next turn. Moreover, on its next turn, it must choose whether it gets a move, an action, or a bonus action, it gets only one of the three. On a successful save, the target takes half as much damage and suffers none of the spell's other effects.
When you cast this spell using a spell slot of 3rd level or higher, you can target one additional creature for each slot level above 2nd. The creatures must be within 30 feet of each other when you target them.