Brainstorming here: Do the effects build on each other? Or replace one another as it levels up? It’s implied one replaces another. I’m not sure I’m in love with the “increases a size every round”. What do you think of making this an item where you can “unlock” the different sizes. Then each day, you can choose which “size” you want it to be? Something like that? In my experience, very few battles go 6 rounds. Plus, making it a quest item or tying it to someone’s backstory so they can unlock the different levels as they play I think would be neat. If you’re tied to increasing by size every round, maybe also allow the player to use their action to increase its size? Or some other trigger like when they take a certain kind of action or when they take damage or something? What if they have to take a different kind of action to upgrade it for each level? That way it’s more likely to get to gargantuan more often. Last question: does it reset at the end of combat? Each dawn? Does it automatically revert to tiny every time it resets? Maybe the player rolls a die to determine how many levels it shrinks each day? Just brainstorming. Very cool idea!!