Defensive Casting Question..... (the joys of fighting Drow)

[Scrogz]

A rogue hits a caster with a 'backstab' which does some damage and applies a 5 point bleed...

Next round the caster, who had won initiative, tries to cast a teleport spell.....

What is the correct DC for the caster's defensive casting check when you factor in the bleed damage?

Is it 15 + 10 (2x spell level)+ 3 (1/2 the bleed damage)? 28 DC?

We were confused as we found seperate rules for periodic damage that started at a 10DC. Just wanted to make sure it is not two seperate checks or something.

[SlimGauge]

The concentration check to cast defensively and the concentration check due to ongoing damage are separate. Success on the first means the caster did not provoke an AoO by casting. Success on the second means the caster successfully cast despite the pain/damage. Failure of either means the spell fizzles (is lost).

[Scrogz]

Two seperate checks... OK.

We did not handle that correctly, but we'll get him next time =)

[ryric]

And you should round down when halving.

So your two checks are:
15+2*5=25 for casting defensively
10+5+2=17 for the ongoing damage.

[Scrogz]

We should but we don't.

Our standard house rule is to always round up in favor of the players and down for the bad guys.

We call it the "Hero Bonus" =)

[Lifat]

wouldn't it be in your favor that you round down on the DC that you need to make before casting your spell?
Otherwise a new question arrives... Can anyone think up a scenario where you want to fail the casting of a standard action spell?

[Scrogz]

I was talking about that specific case. In general we round "in favor" of the players wherever it is needed.

[Lifat]

I kind of knew that, but it was more fun reading it litterally :D