rarity of manastones

[Des]

just one of those items you have to camp... at least it still drops.

[Taluvill]

I personally saw 3 drop in 4 kills, then not another for 2 straight days. idk. It just depends on your luck i guess.

Would say there is close to 250-300 atm? maybe thats a bit much, but you get the picture. some people have one for each alt.