I am currently homebrewing a set of "brawler" races, modeled after the nonhuman, humanoid characters in Brawl Stars. For one race, I've made a homebrew cantrip, Cactus Grenade. Is it balanced?
Casting Time: 1 Action
Range: 60 feet
Components: S, M (a small cactus)
You throw a small cactus at a target within range. Make a ranged spell attack against the target. On a hit, the target takes 1d4 piercing damage. Whether you hit or not, the cactus explodes and anyone within 5 feet of the target (including the target itself) must succeed in a Dexterity saving throw or take 1d4 piercing damage.
The spell's damage (both on impact and area) increases as you reach higher levels. It does 2d4 damage at 5th level, 3d4 at 11th level, and 4d4 at 17th level.