It'll take a little luck, a lot of preparation, and initiative wouldn't be the worst thing
Alas, even just as a powerful creature card entering Magic at a time when Green is feeling awfully powerful (thanks, Badgermole Cub), The Unbeatable Squirrel Girl has every chance at success
However you handle it, an on-rate mana dork that becomes an above-rate one with little to no work excels in just about any deck
309.6: If a players venture marker is on the bottommost room of a dungeon card, and that dungeon card isnt the source of a room ability that has triggered but not yet left the stack, the dungeon cards owner removes it from the game
If you need a card for an event, a birthday, or a last-minute gift, a 23 day timeline is workable in a way that week-long wait times simply aren't