So, a druid/mammoth rider player of mine wants his Huge giant toad with the Hefty Brute feat to gain barding with the Titanic armor property, strictly because he wants to give the giant toad the ability to swallow whole a Colossal-sized creature when they are enlarged with the animal growth spell.
Titanic Armor Property: A creature wearing titanic armor is considered one size category larger for the purpose of using or being affected by special attacks that depend on size, such as swallow whole and trample.
Hefty Brute (Animal Companion): You treat your size as one category larger for the purposes of calculating CMB, CMD, carrying capacity, and any size-based special attacks you use or that are used against you (such as grab, swallow whole, and trample).
Would the effects of the feat and armor ability stack? I want to say no because of the same reason that effective size increases for weapon damage don't stack, but I told my player I'd at least post a thread here to get the question answered.
As animal growth is already a size increase neither the feat nor the armor property stack with the spell itself. As effective size increases the feat and the armor property do not stack with each other.
As animal growth is already a size increase neither the feat nor the armor property stack with the spell itself.
This is wrong, you can have one actual size increase and one virtual size increase.
Would the effects of the feat and armor ability stack? I want to say no because of the same reason that effective size increases for weapon damage don't stack, but I told my player I'd at least post a thread here to get the question answered.
While the original quesiton was about damage increase, the FAQ answer makes a general ruling (or interprets the existing rules in such a way, if you will) that "effective size increase""don’t stack with each other".
I stand corrected (facepalm) :)