Swarm Monger Druid in PFS


Rules Questions


I recently discovered there's still people playing PFS1 and so i started theorycrfting a PFS-legal character that i might eventually try to play.

The idea wasto play a Swarm Monger Druid but my plans came to a halt when i couldn't understand how some interactions are supposed to work in the game.

I'll make a list of all the interactions that make me scratch my head in hope that at least some of the find an answer.

1. How does the Fecund Familiar ability interact with the Merge With Familiar spell?

https://www.aonprd.com/ArchetypeDisplay.aspx?FixedName=Druid%20Swarm%20Mong er

https://www.aonprd.com/SpellDisplay.aspx?ItemName=Merge%20with%20Familiar

What happens if i first merge with the familiar and then transform it into a swarm?
What happens if i first transform it into a swarm than merge it with me?

In both cases, does it retain the immunity to damage and effects?
Does it retain the limitless effect duration while merged?

Or is this interactiion PFS legal but completely unregulated and decided by the DM based on how much he likes you?

Honestly i don't have any idea on how this interaction is supposed to work based on rules.

2. What happens if i take the Mauler archetype and turn my familiar medium with Battle Form?

https://aonprd.com/ArchetypeDisplay.aspx?FixedName=Familiar%20Mauler

What happens if i first turn it medium and then into a swarm?
What about the opposite?

My interpretation here is thatin both cases the familiar occupies 4 contiguous 5by5 squares but the creature receives the damage increase to his swarm attack as usual, get 5 foor of reach they cannot use since they still deal damage to creatures they stand on, and get the usual maluses to stealth and flight.
Probably the number of creatures in the swarm is also reduced, following the swarm subtype description, not like it really matters since it's just visual.

"A swarm of Tiny creatures consists of 300 nonflying creatures or 1,000 flying creatures. A swarm of Diminutive creatures consists of 1,500 nonflying creatures or 5,000 flying creatures. A swarm of Fine creatures consists of 10,000 creatures, whether they are flying or not."

3. What happens if the Swarm Monger dips into First World Wizard for the Fey-Touched Familiar that has the Change Shape ability, a polymorph effect this time that should interact differently compared to Battle Form.

https://www.aonprd.com/ArchetypeDisplay.aspx?FixedName=Wizard%20First%20Wor ld%20Caller

My reading this time is that the familiar if turned into a swarm and then into a human through change shape ir loses the swarm attack by polymorph rules but the subtype remains so i'm a little cunfused.

4. What about the swarm attack itself, is it a natural attack?
The natural attack rules don't mention all of the possible natural attacks, so they might be.
Not only that but many swarms use stings for their additional effects, and they fall into the natural attack category, also the non-swarm version of some of these creatures have natural attacks implying that biting and stinging is what they do when they attack as a swarm but this is already outside of rules territory and more in the common sense one.

So, would an amulet of mighty fists equippped onto the base creature give the bonuses to it when it turns into a swarm?
What about a spell like magic Fang?

Thanks to anyone who replies, tried to look everywhere but i couldn't find even a single answer to all of these questions.


Couldn't read when i postedv yesterday, both Battle Form and Change Shape are polymorph effects so the way they function should be similar if not identical.

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