Ebony Fly

A figurine of wondrous power is a statuette of a beast small enough to fit in a pocket. If you use an action to speak the command word and throw the figurine to a point on the ground within 60 feet of you, the figurine becomes a living creature. If the space where the creature would appear is occupied by other creatures or objects, or if there isn’t enough space for the creature, the figurine doesn’t become a creature.

This ebony statuette is carved in the likeness of a horsefly. It can become a giant fly for up to 12 hours and can be ridden as a mount. Once it has been used, it can't be used again until 2 days have passed.