42 cards where the card is tagged “future-mechanic-reference”

All Hallow's Eve (Masters Edition III #57)
Atraxa, Grand Unifier (Phyrexia: All Will Be One #196)
B.F.M. (Big Furry Monster) (Unglued #28)
B.F.M. (Big Furry Monster) (Unglued #29)
Boldwyr Intimidator (Battlebond #169)
Bonded Fetch (Time Spiral Remastered #54)
Bound in Silence (Time Spiral Remastered #10)
Curse of the Fire Penguin // Curse of the Fire Penguin Creature (Unhinged #73)
Darksteel Garrison (Future Sight #167)
Domesticated Mammoth (Mystery Booster Playtest Cards 2021 #72)
Dryad Arbor (Time Spiral Remastered #277)
Dungeon Master (2016 Heroes of the Realm #2)
Emblem of the Warmind (Future Sight #112)
Frenzy Sliver (Future Sight #85)
Ghostfire (Duel Decks: Merfolk vs. Goblins #40)
Graven Cairns (Double Masters #320)
Grove of the Burnwillows (Iconic Masters #238)
Horizon Canopy (Iconic Masters #240)
Imperial Mask (Future Sight #23)
Karn, Living Legacy (Dominaria United #1)
Krosan Adaptation (Mystery Booster Playtest Cards 2021 #80)
Logic Knot (Time Spiral Remastered #73)
Lucent Liminid (Future Sight #24)
Lumithread Field (Future Sight #25)
Mesmeric Sliver (Future Sight #53)
Mistmeadow Skulk (Outlaws of Thunder Junction Commander #84)
Nimbus Maze (Forgotten Realms Commander #252)
Ramosian Revivalist (Future Sight #30)
River of Tears (Murders at Karlov Manor Commander #283)
Rocket-Powered Turbo Slug (Unhinged #87)
Sarcomite Myr (Time Spiral Remastered #84)
Seht's Tiger (Commander 2017 #72)
Shah of Naar Isle (Future Sight #119)
Snake Cult Initiation (Future Sight #89)
Spellweaver Volute (Future Sight #59)
Spin into Myth (Archenemy #8)
Tarmogoyf (Time Spiral Remastered #235)
The Mana Rig (Dominaria United Commander #28)
Tombstalker (Time Spiral Remastered #146)
Vedalken Aethermage (Future Sight #61)
Whetwheel (Future Sight #168)
Zoetic Cavern (Murders at Karlov Manor Commander #311)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.