Keen Senses. The Zilant has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Magic Resistance. The Zilant has advantage on saving throws against spells and other magical effects.

Limited Telepathy. The Zilant can magically communicate simple ideas, emotions, and images telepathically with any creature within 100 feet of it that can understand a language.

Innate Spellcasting. The dragon’s innate spellcasting ability is Charisma (spell save DC 13). It can innately cast a number of spells, requiring no material 

1/day: color spray

1/day: mirror image

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature.  Hit: 4 (1d4 + 2) piercing damage.

Lightning Breath (Recharge 5–6). The dragon exhales lightning in a 15-­foot line that is 5 feet wide. Each creature in that line must make a DC 10 Dexterity saving throw, taking 12 (2d10) lightning damage on a failed save, or half as much damage on a successful one.