Spell checks for enough mana and max # of followers

[Yasik]

<425hp 20ma 184mv> [+9] AC: -7.1 EXP: 17,194,242 COINS: 398,284 [indoors]
cast 'Summon Undead' spectre
Ok.
You don't have enough mana.

<428hp 1ma 184mv> [+9] AC: -7.1 EXP: 17,194,242 COINS: 398,284 [indoors]
You calm down and return to a peaceful state of mind.

I think many of us would agree that it would be much better if it wouldn't reduce mana if check is unsuccessful. This happens to some other spells, not only summon/animate, and to some other checks - mana deducted if I try to summon more undead than I supposed to have at this level (max legion something blah blah).

<475hp 71ma 184mv> [+9] AC: -7.1 EXP: 20,086,419 COINS: 465,685 [raining]
cast 'Banish Undead'
Ok.
You attempt to banish your undead followers, but seem to lack any.

<475hp 51ma 184mv> [+9] AC: -7.1 EXP: 20,086,419 COINS: 465,685 [raining]

[Sleeping Forest]

i 2nd this motion. its been driving me nuts for some time now. a fix to this would be GREATLY appreciated.

[*Splork*]

To be honest, I can't figure out why its happening. Its not all spells but a few.

[blackmore]

I'm pretty sure it's spells that have a base cost, plus a cost depending on the parameter added. It succeeds casting the base spell, but the added cost causes it to fail.

Also, successfully casting banish undead should cost mana. Just because there wasn't anything to banish doesn't mean the spell failed.