You kill their creatures, counter their cards, and delay the game long enough until you have the ability to kill your opponent with a single card or combo
WUBRG decks are always a little tricky to judge if they're not blatantly powerful right out of the box, and because the theming of this deck is so cool, it feels disruptive to try and make upgrades to it, so it's almost a case of being a precon that you shouldn't upgrade, but yet it desperately needs it
the fact that this tutors for those restricted artifacts means Urza's Saga is restricted in Vintage as well
Even better, it auto-equips those rebels at the start of combat, making your new army instantly battle-ready
Its a good combination of abilities that should allow you to dominate the game with armies of Squirrels, and thats just the kind of thing were looking for
Are Finality Counters Errata