I was on the second level of Dragon's Eye with my solo Dragon Disciple. Naturally I was using damage-over-time acid spells, namely Melf's Acid Arrow and Vitriolic Sphere, to deal with those pesky trolls. Now this is where I noticed something strange.
Before I begin, let me tell you that my DD is on level 10, so that means Melf's Acid Arrow will last for 4 rounds, while Vitriolic Sphere will last for 5 rounds at most. So first I'm injuring the trolls to a "Near Death" condition with Skull Traps and Magic Missiles, before landing the Acid spell. Strangely enough, after the troll goes unconscious, the acid spell does not do any more damage even though its duration is not completely over yet.
Now that makes me waste another precious spell slot to cast a second acid arrow to finish off the troll after
it goes unconscious.
Now my question is: Is this the intended behaviour? Or am I doing something wrong? That is, if I cast an Acid Arrow on a troll just before it goes unconscious, will the damage not continue after it has gone unconscious (even though the spell's duration is still left)?
This is confusing me...
Note: I've posted this in the General Section instead of the IWDEE section, because it's more of a general gameplay question about the IE games.