Maidhc O Casain
Na Bith Mo Riocht Tá!
After giving this one some thought I believe I've got to say no, based on the following reasoning:
You actually get to wield weapons that are one size category larger, you don't give weapons damage as though they were larger. Your trident is actually a large trident, not a medium trident that does large damage. When transformed, your fists aren't large fists, they're still medium. However, when combined with an Enlarge Person spell . . .
You actually get to wield weapons that are one size category larger, you don't give weapons damage as though they were larger. Your trident is actually a large trident, not a medium trident that does large damage. When transformed, your fists aren't large fists, they're still medium. However, when combined with an Enlarge Person spell . . .