Druid, Warlock – Cantrip Spell – Magic Stone
Casting Time: 1 Bonus Action
Components: V, S
Duration: 1 Minute
Attack/Saves: Ranged Attack
You touch one to three pebbles and imbue them with magic. You or someone else can make a ranged spell attack with one of the pebbles by throwing it or hurling it with a sling. If thrown, it has a range of 60 feet. If someone else attacks with the pebble, that attacker adds your spellcasting ability modifier, not the attacker’s, to the attack roll. On a hit, the target takes bludgeoning damage equal to 1d6 + your spellcasting ability modifier. Hit or miss, the spell then ends on the stone.
If you cast this spell again, the spell ends early on any pebbles still affected by it.
My Comments: This spell cries out for arguments and clarifications, but I think it's pretty simple when you read it out and ignore previous versions.
First, it does d6 bludgeoning damage from the spell + your spellcasting ability modifier and nothing else. The d4 damage from a sling no longer applies and neither does the thrower/slinger's strength or dexterity ability modifier. If it doesn't make sense, put a literal pebble in a sling and sling it. Sling stones have to have a certain weight in order to be effective, so, in this case, the damage is from the spell.
Which leads into the second point, it's the spell doing the damage, not the pebble. This is a good thing. It means you can make 3 temporarily magic weapons and hand them out to your friends who don't have anything that affects enemies who are immune to non-magical weapons. Take that Werewolf!
One odd thing here is that you can throw one of these magic pebbles 60 ft, or someone can use it in a sling. Slings have a range of 30/120, which means you have disadvantage after the first 30ft, so if your target is 31-60 feet away, just throw that pebble.
My last comment is that the spell's name is misleading. There are some aspects to the spell that are defined by the fact that it's specifically a pebble and not a larger stone. I guess 'Magic Pebble' just doesn't sound that impressive...