So if your pack would contain a Soft Glow foil Hidetsugu, you then get a subset of options, much like what happened with EA foils in Commander Legends
If an ability targets something controlled by the "defending player" of an attacking creature and the defending player for that creature changes before that ability resolves, the ability won't resolve because its target has become illegal
That breaks down to 15 cards per booster, with at least 1 Multiverse Legend card per pack, 1-2 cards of rarity Rare or higher, and 1 traditional foil in every pack
You can discard or cast early burn and pump spells to threaten opponents, trusting in Tersa to finish the game with those spells cast from your graveyard
1 | Valgavoth, Terror Eater Mana Value: 6BBB Rarity: Mythic Rare Stats: 9/9 Card Text: Flying, Lifelink
Mirri, Weatherlight Duelist [Cat]: The first clause is limiting, but not that limiting