You Are Not Alone
Artemis stared at the acorn. Do I really want this?
Ancient oak, check. Bend in river, check Full moon, check. So why was he waiting?
He wondered whether he wanted to go through the entire "headache" business again every time the moon was full. It had been bad enough last time, he remembered, with all the powerful memories that surfaced at that time.
Make a decision, he thought. Follow it through.
With a sigh, he dibbled a small hole in the ground with the acorn, the pushed it fully in, smoothing the earth over it. For a moment, nothing happened, then a shower of blue sparks erupted from the earth, filling him with their power. He'd almost forgotten what that feeling was like; a new sense opening up once again.
He looked up, spotted a heat haze, and smiled. "You can get on with it now."
There was a sigh, and several invisible hands picked up acorns simultaneously.
There aren't that many ancient oaks by bends in rivers, so it's pretty likely someone would be doing the ritual at the same spot as Artemis. Even if the site isn't the Lia Faìl.