Bugbear, Warlock of the Fiend

Brute. A melee weapon deals one extra die of its damage when the bugbear hits with it (included in the attack).

Surprise Attack. If the bugbear surprises a creature and hits it with an attack during the first round of combat, the target takes an extra 7 (2d6) damage from the attack.

Dark One's Blessing (special): When you reduce a hostile creature to 0 HP, you gain 9 temp HP.

Pact of the Blade:

You can use your action to create a pact weapon in your empty hand. You can choose the form that this melee weapon takes each time you create it. You are proficient with it while you wield it. This weapon counts as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

Your pact weapon disappears if it is more than 5 feet away from you for 1 minute or more. It also disappears if you use this feature again, if you dismiss the weapon (no action required), or if you die.

Spellcasting: The bugbear warlock is a 3rd-level spellcaster with a spellcasting modifier of +4,  Spell Attack of +7 and a spell DC of 15.
At-will: Eldritch Blast, Infestation, Chill Touch
3nd-level (2 slots): Hellish Rebuke, Witch Bolt, Fireball, Counterspell
Repelling Blast: when the bugbear warlock hits a creature with Eldritch Blast, he can choose to push the creature up to 10ft away.

Eldritch Spear: When you cast eldritch blast, its range is 300 ft.

Morningstar (Pact Weapon). Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 11 (2d8 + 3) piercing damage.