Need some encounters for plains/wilderness

[Quickleaf]

This is a party of 6 level 12 PCs.

the players have 3 options ahead of them - a hilly/mountainous area where I already have some prepped encounters, as well as a forest-y area that I'm also ready for.

However, I'm drawing a blank on encounters in more of an open plains/flatlands type of area.

I was hoping for a series of 2-3 encounters that will give them a good challenge.

Thanks

Check out [MENTION=386]LostSoul[/MENTION] 's thread, there's a random table for plains: http://www.enworld.org/forum/d-d-4t...64-random-terrain-features-natural-world.html Not "encounters with creatures", but could be of some inspiration.

There's an old H.P. Lovecraft short story about an evil "genius locii" in an otherwise bucolic place, a meadow/praire with a tree weeping over a pond IIRC. I imagine by day it looked something like the Cornwall Plains:

However, once it bonded with someone they became obsessed with the place to the point that they attempted to drown themself in the pond. The story was really creepy, and you could adapt it to any intangible fey or shadow creature which is bonded to that area.