Size increases and effective size increases: How does damage work if I have various effects that change my actual size, my effective size, and my damage dice?
As per the rules on size changes, size changes do not stack, so if you have multiple size changing effects (for instance an effect that increases your size by one step and another that increases your size by two steps), only the largest applies. The same is true of effective size increases (which includes “deal damage as if they were one size category larger than they actually are,” “your damage die type increases by one step,” and similar language). They don’t stack with each other, just take the biggest one. However, you can have one of each and they do work together (for example, enlarge person increasing your actual size to Large and a bashing shield increasing your shield’s effective size by two steps, for a total of 2d6 damage).
According to this, things that change your actual size don't stack with other things that change your size. Does that mean the typical size increase for an animal companion gained at 4th/7th level make them non-eligible for the spell Animal Growth?
No that increase is just part of them. It is a natural thing. Think of this size increase less of a size increase in a magical sense, and more like how humans might get taller as they age. I mean at some point you were a very small human, are you not affected by enlarge.
No that increase is just part of them. It is a natural thing. Think of this size increase less of a size increase in a magical sense, and more like how humans might get taller as they age. I mean at some point you were a very small human, are you not affected by enlarge.
