Sectype #4 MAGICALATTACK

[Galactygon]

It seems this sectype is hardcoded to burn through protections/deflections/traps as well as opcode 102 (protection from spell level). I have just tested this on BG2:ToB and BG2:EE, and the behavior is the same.

 

To reproduce:

1. Open any saved game where you have Breach memorized (SPWI513.spl)

2. CLUA:CreateCreature("LICH01")

3. Cast Breach on the Lich

Observed: breach burns through despite the power levels of the effects set to 5

4. Open SPWI513.spl in NI or DLTCEP and set the sectype of the spell to 0 (NONE)

5. Repeat steps 1.-3.

Observed: breach does not burn through

[Avenger]

Yes, magic attack can only be deflected by decrementing immunity vs secondary type.