However, going back to the main point, not all the decks could be a hit , but Witherbloom was arguably the closest to a dud when it comes to Strixhaven Commander decks
Then, when they enter the battlefield, either each other Creature gets -X/-X until the end of turn, and you lose X life, or you can return up to X Creature cards with a mana value of X or less from your graveyard to the battlefield, and then give them haste until the end of turn
The need to crack the Clue token after its been created also makes Bygone Bishop somewhat expensive
If the target of Fall of the First Civilization's first chapter ability is an illegal target as the ability tries to resolve, it won't resolve and none of its effects will happen
Also, for an additional cost of one of each mana type, you may untap all attacking creatures, giving them trample, lifelink, and haste until the end of the turn, and trigger another combat phase