Whenever you cast an instant or sorcery spell from your hand, if Taigam attacked this turn, that spell gains rebound
Consign to Dream, Expel from Orazca, Primal Command, and Memory Lapse can all return cards to their owners library, ready for you to fetch with Pako
You also have Annul in the sideboard to prevent Agatha's Soul Cauldron, the deck's main combo piece, from ever hitting the battlefield for just one mana
These two rules together suggest to me that Calamity's Wake exiles itself, continues resolving, then moves to the final steps of resolution which according to 608.2m moves the spell to the owner's graveyard
While you probably just want to kill with Kaervek's Torch, I'd rather use Scrivener looping Ancestral Recall back again and again - targeting the opponent, of course
Costing $32 for the etched version and $69 for the regular printing, this is currently preselling at the price some stores are selling the deck at