Metabot's Manual of Magical Maneuvers

Splinterburst

3-level Evocation

You energize a section of once living material and cause it to explode outwards launching splintering shrapnel. Pick one of the following options when you cast the spell:

• You can gesture towards a 5 foot by 5 foot section of wall or flooring, or a nonmagical wooden object, which is destroyed. Each creature within 20 feet of the target must make a dexterity saving throw. A creature standing next to the section of wood, or holding the object makes the has disadvantage on the save.
• As part of the action used to cast this spell, you lob a pinecone (or similar object) at a location within range. Each creature within 20 feet of the target must make a Dexterity saving throw.

A creature takes 6d6 piercing damage on a failed Dexterity save, or half as much damage on a successful one.
At higher levels: When you cast this spell using a spell slot of 5th or higher, you can also target a creature. If you do so, and the target is a plant creature or a creature comprised of wood, the radius of the area of effect increases to 40 feet. The creature makes the saving throw with disadvantage, and the spell deals maximum damage to it. If you target a nonmagical plant that isn't a creature, such as a tree or shrub, it is destroyed.