It is unclear what determines this time, but its still best to do any Chansey Picks or Bonus Picks immediately once you see it
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Tifa's Limit Break: To double a creature's power and toughness, that creature gets +X/+Y, where X is that creature's power and Y is that creature's toughness when Tifa's Limit Break resolves
However, easily the best aspect of this card is its Calculating and Vain ability, which allows the player to look at the top three cards in their deck and put them back in any order whenever The Queen, Mirror Seeker quests
Whether these inflated prices will hold remains to be seen, but considering the events month-long duration and no indication from TPC or McDonalds that supply shortages are expected, its unlikely that these mark-ups will hold
Outside of Commander, Birgi has made a name for herself in Standard, Pioneer, and even Modern, as she's even better than more traditional cost-reduction permanents