the blades orbs

the caster summons an orb that hovers 1ft in-front of them of an element of your choice, when the casters blade passes through the orb during an attack action it is absorbed by the blade , as the blade hits it deals an additional 1d8 damage of the chosen element along with the additional effect of the specific orb.

for every level higher the caster can chose to have an additional 1d8 damage and increasing the additional effect  as the orb increases in size or have an additional orb of another element appear.

the orbs can not stack in a single hit but will remain around the target until used or 1 minute passes.

orb colour,

red=fire and glows a dim flickering light of 5 ft and lights target on fire dealing 1d4 fire damage until put out using an action of the creature or another creature: higher light increases by 5ft & damage increase 1D4 per level

light blue=air/ force damage and pushes the target 5 ft back:  higher +5ft every level

deep blue= electric deals 1d4 lighting damage and causes a mild stun, affected targets cannot make a reaction until the end of their next turn and have disadvantage on their next attack: higher adds 1d4 damage per level

grey= rock  the target stiffens as rock begins to form around their legs, movement speed is halved and deals 1D4 crushing damage: higher + 1d4 damage per level

green=poison  the poison seeps into the wound and poison the target, the target must succeed on a con save or take 1d4+2 poison damage for 1D6+1 rounds:higher +1D4 damage per level