Sources
CR
Type
Size
Alignment
Movement

Reckoner

Medium Humanoid (any race), Lawful Neutral

Armor Class 18 (plate armor)
Hit Points 52 (8d8 + 16)
Speed 30 ft.
STR
16
+3
DEX
12
+1
CON
15
+2
INT
15
+2
WIS
12
+1
CHA
10
+0
Skills Arcana +4, Intimidation +2, Perception +3
Senses passive Perception 13
Languages Common plus any one language
Challenge 4 (1,100 XP)

Traits

First Strike. The reckoner has advantage on initiative rolls.

Spellcasting

Spellcasting. The reckoner is a 5th-level Boros spellcaster. Its spellcasting ability is Intelligence (spell save DC 12, +4 to hit with spell attacks). The reckoner has the following wizard spells prepared:

Cantrips (at will): blade ward, light, message, shocking grasp

1st level (4 slots): guiding bolt, shield, thunderwave, witch bolt

2nd level (3 slots): blur, levitate

3rd level (2 slots): lightning bolt

Actions

Longsword. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:7 (1d8 + 3) slashing damage, or 8 (1d10 + 3) slashing damage if used with two hands.

Reactions

Lightning Backlash (Recharge 5–6). When a creature hits the reckoner with an attack, the attacker takes lightning damage equal to half the damage dealt by the attack.

Lore

Boros reckoners combine physical power and magical prowess, serving as the shock troops of the legion. They are adept at breaking up mobs and organized lines of defense. Sometimes described as living thunderstorms, reckoners charge their bodies with lightning that bursts forth in their spells and lashes out at enemies who harm them. Many reckoners are minotaurs.