Aggressive. As a bonus action, Chief Grulag can move up to its speed toward a hostile creature it can see.
Blessings of the Ruiner. Chief Grulag has been showered with a cocktail of divine blessings, and can call upon them at any time. [Chief Grulag] has an innate spellcasting ability of [Wisdom] (spell save DC 15). [Chief Grulag] can innately cast the following spells, requiring no material components:
At will: [thaumaturgy]
3/day each: [flame strike], [spirit guardians]
1/day each: [control weather], [divine word], [fire storm]
Legendary Resistance (2/day). If Chief Grulag fails a saving throw, he can choose instead to succeed instead.
Unarmored Defense: While Chief Grulag is wearing no armor and not wielding a shield, his AC equals 10 + his Dexterity modifier + its Constitution modifier.
Multiattack. Chief Grulag makes 4 attacks with his greatswords or three attacks with its spear.
Dual Greatswords. Melee Weapon Attack: +10 to hit, reach 5 ft., 1 target. Hit: 13 (2d6 + 6) [piercing] damage plus 3 (1d6) fire damage.
Spear. Melee or Ranged Weapon Attack: +10 to hit, range 20/60 ft., one target. Hit: 13 (2d6 + 6) [piercing] damage plus 3 (1d6) fire damage, or 15 (2d8+6) piercing damage plus 3 (1d6) fire damage if used with both hands to make a melee attack.
Chief Grulag can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of a creature's turn. Chief Grulag regains spent legendary actions at the start of his turn.
Attack. Chief Grulag makes a spear or greatsword attack.
Move. Chief Grulag moves up to half its speed.
Casts a Spell (Costs 3 actions). Chief Grulag casts an innate spell.