Weakened Daemon Annihilator (level 6)

Summoned Existence

The Daemon Annihilator does not exist naturally. It can only be summoned via the Summon Annihilator spell. Once summoned, it remains forever until its killed or until it is dismissed.

Biometal Regeneration

At the start of each of its turns, the Daemon Annihilator regains 3 hit points, unless it has been affected by a wish spell or divine intervention.

attacks per action(1 Biomatal Blade and 1 Screech) 

Biometal Blade

Melee Weapon Attack: +15 to hit, reach 10 ft., one target.

Hit: 4d12 + 8 slashing damage plus 4d12 force damage.

Screech

It makes an ear piercing screech causing every one in a 20 foot cone forward to make a Constitution DC (18) saving throw or take 1d8 psychic damage and is deafened until its second turn

Reactions(5 per combat)

Annihilation Counter

When a creature within 30 feet of the Daemon Annihilator casts a spell of 2nd level or lower, it can absorb the magical energy and immediately regain 10 hit points. The spell is countered as if by counterspell, but the Annihilator does not need to make a check

Body Block

When a creature make a attack towards the summoner as a reaction the Deamon Annihilator can block the attack, taking all the damage onto itself, instead of the summoner.