Yes, if the rules say that I should.Likewise, if a creature's saving throw succeeds against a targeted spell, such as charm person, you sense that the spell has failed. You do not sense when creatures succeed at saving throws against effect and area spells.
Valmur_Dwur said:I'll answer your question then I rantNow I'm running a PbEM at the moment but I apply it when I DM ftf. You should never know if your spell was saved against or not. Only if there is some obivious physcial response ie sleep.
Otherwise even a Charm person should require that the spellcaster only have the slightest hint that it worked.
And it should be easy to fool if you know what would be expected.
By this I mean your MU who has not cast the spell in anger only in learning it (Charm Person that is) casts it upon an enemy MU who has the spell and has cast it on some mook allies in the past. How would MU 1 know whether MU 2 was under the spell unless he tried to have him do something that was of a boon to MU 1 party?
Furthermore, could you trust the spell to be actually controlling MU 2 or is he playing along?
At first, yes. Later on ... maybe not. If you ask too much of the target, and they throw off the spell ... YOU might not know that.
But BY THE BOOK ... spellcasters know when their Targetted spells fail.
But BY THE BOOK ... spellcasters know when their Targetted spells fail.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.