Multiattack

The idolic deity can use its Seduce the Righteous. It then makes two Slam attacks.

Slam

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d6 + 5) bludgeoning damage plus 18 (4d8) psychic damage.

Seduce the Righteous

The idolic deity corrupts one creature it can see within 30 feet of it. The target must succeed on a DC 16 Wisdom saving throw or have disadvantage on attack rolls, ability checks, or saving throws (the idolic deity's choice) until the end of its next turn. Creatures that wield divine or celestial power, such as clerics, paladins, or aasimars, have disadvantage on the saving throw.