You can get them back directly with Crucible of Worlds and Ramunap Excavator or indirectly via Wrenn and Six and World Shaper
Absolute Virtue Adelbert Steiner Aerith Gainsborough Ambrosia Whiteheart Ardyn, the Usurper Ashe, Princess of Dalmasca Bahamut, Warden of Light Balthier and Fran Barret Wallace Bartz and Boko Beatrix, Loyal General Black Waltz No
$0.49 Flamekin Herald Commander Legends $1.49 Mulldrifter (Borderless) Double Masters 2022 Variants $4.49 Titan of Industry (Borderless) Streets of New Capenna Variants $0.59 Bigger on the Inside Universes Beyond: Doctor Who $0.39 Imoti, Celebrant of Bounty Commander Legends $1.79 Temur Battlecrier (0372 - Borderless) Tarkir: Dragonstorm Variants $5.99 Temur Ascendancy Khans of Tarkir $4.99 Risen Reef Special Guests $0.49 Sakashima's Protege Commander Legends $1.29 Garruk's Uprising (0053) Wilds of Eldraine Enchanting Tales $1.99 Yarok, the Desecrated (0025 - Non-Foil) Secret Lair $7.49 Apex Devastator Modern Horizons 3 Commander Decks 0 results found
You can use the mana produced by Brotherhood Headquarters's last ability to cast a spell with freerunning even if you're not paying that spell's freerunning cost
Swans of Bryn Argoll can be combined with Seismic Assault to convert every land into a draw-two
And obviously, the card makes Peter Pans easier to catch