Artificer Grenade

This fist-sized metal ball is engraved with runes of magic. As a magic action, you can activate the grenade’s magic and hurl it at a point on the ground you can see within 60 feet of you. The grenade explodes and produces a specific effect, depending on which type of grenade it is.

An artificer may choose to craft these grenades using tinkers tools starting at 12th level, you may craft one grenade per day at the cost of one of your highest level spell slots and 50gp worth of materials, you must succeed on a DC 17 Arcana check or the creation fails. You may have no more than 3 grenades at one time, creating a 4th grenade causes the oldest grenade in your inventory to go dormant.

Chaos Flashbang. This grenade produces an extremely loud noise and a blinding flash. When the grenade lands, each creature within 20 feet of it must succeed on a DC 15 Constitution saving throw or take 1d8 thunder damage and be blinded and deafened for 1 minute. A creature can repeat this saving throw at the end of each of its turns, ending the effect on itself on a success.

Gravity Well. This grenade produces a gravitational blast. When the grenade lands, each creature within 30 feet makes a dex save DC 15 or is pulled 15 feet toward the point of impact and has it's movment speed reduced by 10 for 1d4 turns. 

Fragmentation. This grenade explodes in a blast of fire and metal. When the grenade lands, each creature within 20 feet of it takes 1d6 fire damage and 1d6 piercing damage and is ignited taking 1d6 fire damage at the beginning of each of it's turns unless it or another creature uses it's action to put out the flames.

Haste Grenade. When the grenade lands, each creature within 20 feet of it is affected as if by the haste spell (no concentration required).