Earthen Walk. The drake's speed is unaffected by earthen or lava difficult terrain. 

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 10 (2d6+3) piercing damage.

Headbutt. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 10 (2d6+3) bludgeoning damage plus 1 piercing damage.

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 7 (2d4+3) slashing damage. 

Tail. Melee Weapon Attack: +5 to hit, reach 10 ft., 1 target. Hit: 6 (1d6+3) bludgeoning damage plus 7 (2d4+3) piercing damage. 

Rock Spit. RangedWeapon Attack: +5 to hit, range 10/35 ft., 1 target. Hit: 9 (3d4+1) bludgeoning damage.

Mini-Earthquake (Recharge 4-6). The drake slams its feet onto the ground, causing it to shake aggressively and toss debris and chunks of stone from the ground. Every Large or smaller creature within 40 ft of the drake must succeed on a DC 14 Dexterity saving throw, taking 4 (2d4) bludgeoning damage and be knocked prone on a failed save, or half as much damage and still be knocked prone on a success.