A new question came up about penetration last night.
We were preparing to fight a dragon, so were grabbing all the bonuses to penetration that we possibly could.
With fixed arcane connection, nickname, daily horoscope and crafted likeness I got a quite nifty penetration score of 56 before we've even started working out casting totals.
This penetration obviously applied to any spells cast on the dragon.
Which was fine. But, killing the dragon was a task set by my Bjornear mystery cult, so I wanted to finish it off in my heartbeast form of a bear.
As my heartbeast, I'm a natural animal, so MR doesn't stop me mauling the dragon. But it's too big for me to damage. So I cast one of my other spells, to grow to a size 8 bear. Normally in this form, I can't get past MR or parma, because the spell level is so high that I just have no penetration.
So the question came up, can I use the dragons arcane & sympathetic connections when I cast the 'grow humungous' spell on myself, to add 'targeted penetration' to the spell?
ie I'd be able to maul the dragon through it's MR, but I wouldn't be able to maul it's friend the kracken, because whilst the spell was cast with lots of penetration, it was penetration specific to the dragon, and not to anything else.
Sorry, this question ended up being long and rambling.. in a nutshell:
Can I use arcane connections to a third party, when casting a spell on myself, so that I can later maul that person with penetration?
Last night we temporarily house ruled that on that occasion I could maul the dragon, and would base a more permanent house rule on what you guys say here.