Serpent's Prey. If Zygarde 10% moves at least 15 feet underground or straight toward a target and then hits it with a claw attack on the same turn, the target takes an extra 8 (2d8) slashing damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked prone. If the target is prone, the roaring mane can make a bite attack against it as a bonus action

Keen Hearing and Smell. Zygarde 10% has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Prideful Guardian. Zygarde 10% has advantage on saving throws against being charmed or frightened.

Magic Resistance. Zygarde 10% has advantage on saving throws against spells and other magical effects.

Limited Telepathy. Zygarde 10% can magically communicate simple ideas, emotions, and images telepathically with any creature within 100 feet of it that can understand a language.

Multiattack. Zygarde 10% makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 5) piercing damage plus 3 (1d6) force damage.

Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 5) slashing damage.

Dragon Pulse (Recharge 5–6). Zygarde 10% exhales fire in a 60-foot line. Each creature in an 60-foot line that is 5 feet wide. Each creature in that line must make a DC 16 Dexterity saving throw, taking 55 (10d10) Force damage on a failed save, or half as much damage on a successful one.

Land's Wrath (Recharge 5–6). Zygarde 10% unleashes an earth-shattering roar, sending out a shockwave in a 15-foot cone in front of it. Each creature within the area must succeed on a DC 15 Constitution saving throw or take 20 (4d10) thunder damage, be knocked prone, and have its speed reduced to 0 until the end of its next turn. Zygarde 10% can use this action while it is burrowed, and if it does so, the ground in the area becomes difficult terrain for other creatures for 1 minute. Each 5-foot square of difficult terrain can be cleared if a creature spends its action to do so.