Where to hunt for higher lv sheltoms

Like Inferna,enigma,bellum??

By luck, I already drop a inferna at i1 from a regular monster (DeadZone, don't really remember what monster), so this map and beyond you can drop them... It's just a matter of luck.

babel & kelvezu drop up to highest sheltom, too. Lost1 drop bellum.

btw, there is no enigma if I'm not wrong.
http://www.crazypt.com/4.htm -> see last aging formula
The last 3 sheltoms are inferna, bellum(use enigma graphic), no future (red skull?).

Actually it's like this in order:
1.Fadeo
2.Sparky
3.Raident
4.Transparo
5.Murky
6.Devine
7.Celesto
8.Mirage
9.Inferna
10.Enigma
11.Bellum/Death

The sheltoms lucidy-celesto do not drop through monsters. The only way to obtain them is by purchasing them in the potion shop at ric. Mirage and inferna start dropping in iron 1 or iron 2 and will drop in every map higher than that. Enigma (renamed as bellum) drops starting in lost island. Bellum (renamed as no future) drops starting in endless tower. Kelvezu will also drop no futures.