Captain Sylkain, the Executioner

Charge Sword. Sylkain charges his sword with lightning magic. His weapon will now deal an additional 2d12 lightning damage for 1d6 rounds.

Lightning Magic. Sylkain possesses an advanced proficiency in the use of lightning and electricity-based spells. He has an advantage on all rolls involving lightning magic.

Spellcasting. Sylkain is a 4th-level spellcaster. His spellcasting ability is STR (spell save DC #, +# to hit with spell attacks). The [monster name] has following [class name] spells prepared:
1st level (2 slots): feather fall, chromatic orb 
2nd level (2 slots): flaming sphere, healing spirit
3rd level (2 slots): lightning bolt, call lightning
4th level (2 slots):arcane eye, ice storm

Guillotine Broadsword. Melee Weapon Attack: +6 to hit, reach 6 ft., 1 target. Hit: 8 (3d8 + 7) Slashing damage.

Kunai. Melee/Ranged Weapon Attack: +4 to hit, range 20 ft., reach 2 ft., 1 target. Hit: 5 (2d6 + 3) Piercing damage.

Execution Combo. (Costs 2 Actions). Sylkain casts black tentacles on a creature. The creature must succeed a DC 7 DEX Saving throw or be restrained by the tentacles. If the creature is restrained, Sylkain will strike at the creature's neck. Flip a coin for damage. If the coin lands tails, the creature's health will be cut to 50%. If the coin lands heads, the creature will die. If the creature's health is below 30% and the coin lands tails, the creature will die.

Whirling Parry. (Can only be used in reaction to a melee attack). If a creature attacks with a melee weapon, Sylkain can use this action to roll a d20. If the roll is over 12, Sylkain will deflect the attack and step behind the creature. When behind the creature, Sylkain will make an attack with his broadsword for 2d12 damage on top of the sword's normal 3d8+7 damage.