Automaton

Spark. The automaton has 5 spark points, which represent its internal stores of energy, and are used to fuel its actions. It regains 1 spark point at the start of each of its turns, up to the maximum of 5. Actions which would reduce spark points below 0 cannot be used.

Advanced Targeting. The automaton suffers no penalties on ranged attacks made when the target or any hostile creatures are within 5 feet of it.

Boost Punch. When the automaton hits a creature with a slam attack while it has flying speed, it deals an extra 5 (1d8)  bludgeoning damage. Additionally, while the automaton has flying speed, it does not provoke attacks of opportunity.

Immutable Form. The automaton is immune to any spell or effect that would alter its form.

Magic Resistance. The automaton has advantage on saving throws against spells and other magical effects.

Magic Weapons. The automaton's weapon attacks are magical.

Linguist. By default, an automaton only speaks (many dialects of) the long-forgotten language of its creators, the ancients. However, it can learn any language to the point of basic communication within a week, and become a fluent speaker within a month.

Multiattack. The automaton makes one Slam attack and one Ocular Laser attack, or two Ocular Laser attacks. If it currently has flying speed, it may instead make one Meteor Slam attack and one Ocular Laser attack.

Boosters. The automaton spends 2 spark points to fire its internal boosters, gaining a flying speed of 60 feet until the end of its next turn. It may then make a slam attack on any target it can reach with its movement this turn (taking the new flying speed into account).

Slam. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 19 (3d8 + 5) bludgeoning damage.

Spark punch. Melee Weapon Attack: By consuming 1 spark point, the automaton surges with a cloak of electricity and rushes up to 10 feet in a straight line towards a target, then uses a Slam attack on the target. Whether or not the attack hits, the target, as well as any other creature within 5 feet of it or the automaton (excluding the automaton itself) must make a DC 15 dexterity saving throw, taking 17 (3d8+3) lightning damage on a failed save, or half on a success.

Ocular Laser. Ranged Weapon Attack: +7 to hit, range 40/120, one target. Hit: 14 (3d6 + 3) radiant damage.

 Spark Beam. The automaton expends 2 spark points and fires a radiant beam of energy in a 60-foot line that is 5 feet wide. Each creature in that line must make a DC 15 Dexterity saving throw, taking 45 (13d6) radiant damage on a failed save, or half as much damage on a successful one.

Meteor Slam. This action can only be used while the automaton has flying speed. The automaton expends two spark points to turn its boosters straight up, and come crashing down on a target. The automaton falls up to 50 feet straight down, then uses its Slam attack on a target directly beneath that it lands in the space of. On a hit, the target takes 4 (1d6) bludgeoning damage per 5 feet the automaton fell (in addition to the normal damage from the slam attack, plus 1d8 from boost punch), and must succeed a DC17 Strength saving throw or be knocked prone. On a success, the target may move to an adjacent empty space if they wish.

Spark Nova. The automaton expends 5 spark points, expelling all of its stored energy as a blinding, baleful wave. All creatures within a 20 foot radius of the automaton (excluding the automaton itself) must make a DC 16 dexterity saving throw, taking 58 (10d10+3) radiant damage on a failed save, or half as much on a success

Spark Field. When the automaton is targeted by a melee attack (whether or not it is hit), it may spend 1 spark point as a reaction to burst with electricity. The attacker must make a DC 15 dexterity saving throw, taking 16 (3d8+3) lightning damage on a failed save, or half on a success.