Makrin Creeper Seedling

Makrin Creeper Seedling is a non-combat pet.

Source
Makrin Creeper Seedling is obtained via in-game mail for players who pre-ordered the Rise of the Hutt Cartel expansion.

Mail text
Players receive an in-game mail titled Thank you for your purchase of Star Wars from Star Wars: The Old Republic with several items attached.

"Enclosed are your special pre-order item rewards as a thank you for your purchase! Simply click on the items to accept them and have fun as you continue your adventure in Rise of the Hutt Cartel.''

''Have fun, and may the Force be with you!"

- 1st Anniversary Fireworks mail text