Crystalline Forest

After completing the 10 minute cast you touch the ground and for 640 feet out from you as the center of the spell, a dense forest of 50 foot tall crystal trees, plants, shrubs, and foliage erupt from the ground. Any existing vegetation is instantly crystallized and are indistinguishable from the crystal vegetation the spell creates.

While the spell is active the caster can command any part of the forest to attack any creature in it's radius. Trees attack doing 3d6 slashing damage, smaller vegetation like shrubs, bushes, leaves & vines do 1d6 +4 slashing damage, and the ground is considered hazardous terrain that causes 1d4+1 piercing damage per 5 feet of movement and movement speed is reduced by 1/2. Vines will also attempt to entangle and restrain any creature that comes near them. If a creature is grappled by a vine they can attempt to break the grapple with a strength saving throw vs the casters spell DC.

Everything the Crystal Forest creates from a tree to a blade of grass has an Armor Rating of 17, the hit points will vary from 110 for the trees to 2 for a blade of grass. The GM will decide how much hit points the piece of the forest has when it is attacked.

Any creature that was in the forest when the spell was cast has to make a Dexterity saving throw to avoid being grappled by the crystal as it spreads out. If they fail their save they can make a Strength saving throw at the top of their next turn to break free.

While in the Crystal Forest the caster is considered hidden in plain sight. The effect is similar to the Greater Invisibility spell, except their foot falls leave no trace and make no sound.The caster is also aware of any and all creatures that enter the forest as soon as they touch a crystal and effectively has blindsight.

The Crystal Forest is immune to non-magical attacks, and resistant to magical Fire, Lightning, and Radiant damage. The forest does take an additional 2d6 damage from Necrotic and Thunder damage. The Crystal Forest is permanent until a dispel magic spell is used at the point of creation (where the caster touched the ground originally).