Wouldn't be the first time we see a misleading tooltip in ESO...
ferzalrwb17_ESO wrote: »What are you talking about? For starters I find the extra 30% resource return quite handy but it increases things like weapon crit, spell crit, spell power, weapon damage.
It doesn't increase duration (that's an alchemy crafting passive) but it does increase numerical effect by 30% of everything that I've looked at so, for once, the tooltip is correct.
I've tested it and Catalyst does not increase anything on a potion other than the base health, magicka, or stamina return.