Welcome back, <@&1280198105299419187> s! 
You know the drill: new month, new theme. Every answer will have some relation to the other, so pay close attention! I've also decided that the first person to correctly guess the theme at the end of the month will receive an extra 100 XP!
As a small hint, today's message has a specific answer, so make sure to think about it carefully.
Ready to get started? The first riddle of the month is ...
*I never sleep, a mindful eye,
The sentinel as hours fly.
My limbs sweep round in measured grace,
Yet never walk nor leave their place.Adorned or clutched, both tool and prize,
I wane your life before your eyes.
My whispered truths you cannot stall —
The rise, the drift, the end of all.
What am I?*
Remember, everyone who guesses correctly will be rewarded 300 XP tomorrow morning!