The card cast from Lurrus isn't exiled, so as long as it doesn't get removed from the graveyard through other means, you can always recast any spell you play with Lurrus on your next turn
It was there the two brothers discovered that the seal was being held by a Thran artifact known as a powerstone
We also run powerful support cards to close out games like Chandra's Incinerator turning all ping damage into creature removal, Laelia, the Blade Reforged growing into an enormous threat with Ob's exile draw, turning Ob into a 1-shotter with Temur Battle Rage, and protecting him from removal with tons of cards like Armor of Shadows
or Kalemne, Disciple of Iroas to get additional experience counters without tapping to kill creatures
(The same is true for card types that don't appear in most games, like plane or scheme.) You can't choose a subtype, such as creature types like Spider or Hero, artifact types like Treasure or Food, or enchantment types like Aura
Today, I focus on cards that help a typal deck in a generic way, like Cavern of Souls and Coat of Arms, and not on a specific creature type like elves or goblins