Axeylosaurus

Axe Tail Sweep: This creature has a massive axe attached to the end of its tail. When this creature makes a Tail attack and the target creature fails its saving throw and is knocked prone, the Axeylosaurus may make an additional Tail attack as slashing damage.

Tail. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 18 (4d6 + 4) bludgeoning damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw or be knocked prone.

Tail Beat. 2/day: When an enemy is attacking, the Axeylosaurus can slam its tail onto the ground kicking up dirt and dust between itself and the attacking enemy. When this creature is attacked by a creature within 30 feet that it can see, it can use its reaction to impose disadvantage on the attack roll, causing dust and debris to blind the target. An attack that can’t be blinded is immune to this feature.