Warlock-Engineer

Sunlight Sensitivity. While in sunlight, the skaven has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Keen Smell: The skaven has advantage on Wisdom (Perception) checks that rely on smell.

Pack Tactics: The skaven has advantage on an attack roll against a creature if at least one of its allies is within 5 feet of the creature and the ally isn’t incapacitated.

Warp Accumulator Instability. Any time the Warlock-Engineer casts a spell of 3rd level or higher  or suffers a critical hit, roll a d20. On a natural 1, the Warlock-Engineer explodes and creatures within 15 feet must make a DC 13 Constitution saving throw or suffer 18 (4d8) thunder damage and be pushed 10 feet. On a successful save, the creature takes half as much damage and isn’t pushed. The Warlock-Engineer is destroyed and if the trigger was a spell, the spell fails.

Spellcasting: The Warlock-Engineer is a 5th level caster. It’s spellcasting ability is Intelligence (spell save DC 13, +5 to hit with spell attacks). It knows the following spells:

• Cantrips (at-will): Booming Blade, Eldritch Blast, Mending, Shocking Grasp
• 1st level (4 slots) : Thunderous Smite, Thunderwave
• 2nd level (3 slots): Scorch (Aganazzar's Scorcher), Skitterleap (Misty Step)
• 3rd level (2 slots): Warp Lightning (Lightning Bolt), Warp Storm (Call Lightning)

Booming Blade. Melee Weapon Attack: +4 to hit, reach 10 ft., one target. Hit: 12 (1d10 + 1d8 + 2) slashing damage.  If the target willingly moves before the end of the Warlock-Engineer's next turn, it immediately takes 9 (2d8) thunder damage, and the spell ends.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage.