Crystal Lizard

Pounce. If the crystal lizard moves at least 30 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 13 Strength saving throw or be knocked prone. If the target is prone, the crystal lizard can make one bite attack against it as a bonus action.

Spellcasting. The crystal lizard is a 1st-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 12, +1 to hit with spell attacks). The crystal lizard has following Wizard spells prepared:
 Cantrips (at will): ray of frost

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.