The thing is, Gonti supports theft, even when opponent's do the stealing, so this can turn into more than one treasure per turn at the right table
Plus, since its only an uncommon, you might already have a few laying around
What adds to its charm is the mystery around how many were actually handed out
If you do nothing, then you're not using Siege Rhino to its full potential
Im not going to run through all of them, because there are fifteen of them and I need to think about how much time I spend talking about a card game full of elves (and now hobbits and cyber squid) especially when it crosses over with broken toys I got from the Salvos up the street from Woolies except I didnt really, Im pretty sure a bunch of those were Go-Bots, anyway
Additionally, this rat commander allows you to mill yourself four cards at your end step, in turn letting you return up to two rats from the graveyard to your hand