Innate Spellcasting. The dragon priest's innate spellcasting ability is Wisdom (spell save DC 14), +6 to hit with Spell Attacks. It can innately cast the following spells, requiring no spell slots:
Dragon Priests' Dagger. Melee Weapon Attack: +6 to hit, reach 5 ft, one target. Hit: 1d4+3 piercing damage, plus 1d6 necrotic damage and the targets hit point maximum is reduced by the necrotic damage dealt (resets after a long rest).