At carton level (12 boxes), Japanese opening data suggests approximately 2 total SA pulls, giving roughly a 50% chance of seeing the Giratina V SA in one carton
Finally, enjoy the hobby Pokmon cards are about fun first
"If no Digimon was deleted by this effect" refers to times where, when is activated, your opponent doesn't have a Digimon with a play cost of 6 or less in play, or an effect makes it so that there are no Digimon you can delete
Part of a cycle that features the almost-as-broken Gaea's Cradle and somehow the hilariously unbroken Shivan Gorge, Tolarian Academy taps to make a mana for each artifact you control, which led to decks that would dump their entire hand of cheap artifacts, make a ton of mana by tapping and maybe untapping Tolarian Academy, and then use big card-draw spells like Windfall and Stroke of Genius to refill before eventually milling the opponent out with Stroke of Genius, potentially all on Turn 1
Effectively a 7-mana 5/5 with a keyword soup pulled from that original cycle of equipment, Kaldra Compleat is a nigh-unkillable threat and represents one of the top-end finishers in Stoneforge Mystic decks