I've spent 4+ hours solidly moderating today, so I've decided it's time to let my hair down a bit.
The purpose of this thread is a combined Riddle/Poetry thread. Riddles/Small poems may be posted by a user, and the other posters get one guess per post to guess who or what the poem/riddle is about. Once the Riddle/Poem poster acknowledges a correct answer, the next person to jump in with a Riddle/Poem becomes the next Riddle/Poem poster, until their riddle has been answered correctly.
I'll start with a relatively easy/topical one.
Alone I stand in a sea of Thunder,
On the Ocean resides my shield,
But also my greatest Foe,
Every continent has borne my banner.
What am I?