Fossilized Egg

The egg weighs 3 pounds. As an action speak
the eggs command word and it instantly
transforms into a triceratops. If you dont have
proficiency with Animal Handling, the
triceratops targets you. If you are proficient, the
triceratops is friendly to you and your party.
It obeys any commands that you issue to it, no
action required by you. The triceratops reverts
back to an egg after 1 hour or if it drops to 0 hit
points. Once you use the egg, it cant be used
again until 7 days have passed.