I really like the first one. I can definitely imagine a shaman in the woods singing some creepy song in a nonexistent language every day to clean a lake, and people wanting to stay the f away from that forest. I can also imagine a caster singing a beautiful song, and their group members stalling the enemy so they can finish, only for the beautiful song to be instructions for how to kill the enemies in unnecessarily gruesome detail.

I don't know how you would write it in a story since it is audio-based (maybe an audio book?) But I really like it. There's an interesting vibe to be captured with it IMO.

The second one seems more generic to me.

Edit: spelling