Legendary Resistance (3/day). If Gavel fails a saving throw, he can choose to succeed instead.
Scales of Power: As a bonus action, Gavel can make a magic circle appear on the ground in a 30-foot radius originating on him. While in this circle, he was resistance to all damage, advantage on attack rolls, and scores a ciritcal hit on a roll of 15 or higher. If gavel receives more than 30 damage in a single round, this ability ceases to function, and Gavel gains three levels of exhaustion. At the beginning of each of his turns Gavel can roll 1d6 and regain this ability on a 6.
Spellcasting: Gavel is a 17th level spellcaster. It's spellcasting ability is Intelligence (spelll Save DC 18, +8 to hit with spell attacks). Gavel has the following cleric spells prepared:
1st: command, heroism
3rd: enhance ability, slow person
5th: mass healing word, slow
7th: compulsion, locate creature
9th: commune, dominate person
Multiattack. Gavel makes two strikes with his hammer, the Edict.
Edict. Melee Weapon Attack: +8 to hit, range 5 ft., one target. Hit: 2d8 +4 bludgeoning damage and target must make a DC 17 Wisdom saving throw, falling under the effects of the confuse spell on a failure.