What do you think of this villian

[Elder-Basilisk]

That's yet another reason not to use this villain. (And, ironically, for him to use his wings in a secluded environment). Last time I checked, "don't let Faerûn find out we're here" translated into "Leave no living witnesses and destroy the bodies" in BBEG speak. So, you have a villain who is easily capable of killing the whole party (barring incredible luck (two failed Hold Person saves in a row, a critical hit from a charging, power attacking, smiting paladin with a scythe or mercurial greatsword, etc)), and has a very good reason to leave no survivors. Unless you want a 50+% chance of a TPK (heck, the CR alone indicates that a 4th level party has less than a 50% survival chance against him and that's before the specifics of 8d6 fireballs vs lvl 3-4 parties are taken into account), he's not a good villain to use.

That's like saying all orcs are evil.

A fey'ri has another interest: don't let Faerûn find out we're here. There are only around 60 of them (and maybe 20 demonfey half-demon elves on top of that) - nearly not enough to withstand a massive elven assault. And assault they will if they find out that the Dlardrageth are alive and kicking (and trying to bring the continent under their clawed clutches).

 

[Krail Stromquism]

My point of him flying was more a response to Winternights post about his group killing him with the Paladins charge. A flying creature gets the drop on people but he's tooling around on the ground so any Tom, Dick or Rolf can charge him?

Why use this villian? Becuase its KEWL! thats why! Every group wants a cool villian to go up against. It just makes for a grander experience, and story. If thats what you want than go for it. Its your game, feel free to use and abuse the campaign setting in anyway you want. I threw out half the changes they made in 3E to FR because they were just plain silly to me (Thayan Embassey? Wha? Unilateral expansion? with enemy countries? sure...right...whatever.) So do what you gotta do my friend, if your players are strict by the book FR fans and they know all the ins and outs and will instantly recongnize the creature for what it is and that ruins the story for them then dont include it, but if they dont know or dont care and will think its KEWL than include it.

I'll restate that I think its too strong for them to face. As well as his lair would never be underground or a confining space due to that negating a strong natural ability and advantage. I also like building villians off a theme or motif. I design bad guys to illustrate to my players just what they can do if they find the rules to back them up. For example I threw a Sundering expert at my group, they faced her a couple times and they were all gunning for her. They had special weapons constructed to help them out too. They were really relieved when they beat her.

anyhow

 

[Kae'Yoss]

I threw out half the changes they made in 3E to FR because they were just plain silly to me (Thayan Embassey? Wha?

I think it's quite funny. They saw that they cannot just roll over the whole continent, and now try to buy the whole continent

Also, imagine the party fighting red wizards when the party mage suddenly reads that small "Made in Thay" sign on his wand of fireballs. That will be something to think about...

 

[Darklone]

One idea how you could use that villain with endangering your group: Have them witness how he "treats" another group of their allies.