It goes infinite quite easily, usually in conjunction with Rosie Cotton of South Lane, Ivy Lane Denizen, or one of numerous other cards that can put +1/+1 counters on the oak when the Squirrel tokens enter the battlefield
"Unlimited format removed from vs mode"
It creates a 0/0 colorless Construct artifact creature token that can grow larger at the beginning of your end step
Here we explain what sideboards are, how they work in paper and in MTG Arena, and how to build your own
I dont think this caught on either because it didnt appear outside this set (at least I dont think so, I think I would remember seeing the untap symbol somewhere), which is strange because this seems really powerful
If you have a Pokemon card with the star symbol, its value is definitely worth investigating