"Okay, here's The Thing."

A flying saucer has crashed into the Frozen North! And what's inside? A horrific, amorphous mass of mutating cells that looks like a cute pony sometimes. It's Thingpone! A ponified version of the titular Thing from The Thing*!

Scenario 1: Princess Cadance sends a crack team of ponies to investigate the crashed UFO, and (you're) on the team. Literally the second they enter, Thingpone eats them, leaving you alone with the pony-assimilating alien.

Scenario 2: Same as scenario 1, but Thingpone falls in love with you! You're the apple of all 20+ of its eyes!

Scenario 3: (You) are enjoying a nice, peaceful walk through the Everfree Forest when Thingpone decides it's hungry, and you're looking like a snack.

Scenario 4: The same as scenario 3, but instead of wanting to eat you, Thingpone decides she loves you. Cute!

Thingpone is an /mlp/ collab, designed by Nips [https://derpibooru.org/profiles/Nips]

Pic by Dotkwa: https://derpibooru.org/images/881621