22 cards where the card is tagged “alternate-equip-cost”

Ace's Baseball Bat (Doctor Who #170)
Bilbo's Ring (The Lord of the Rings: Tales of Middle-earth #298)
Blackblade Reforged (Dominaria United Commander #178)
Bloodthorn Flail (The Lost Caverns of Ixalan #93)
Ceremonial Groundbreaker (Streets of New Capenna #175)
Commander's Plate (Commander Legends #305)
Demonmail Hauberk (Innistrad #221)
Dúnedain Blade (The Lord of the Rings: Tales of Middle-earth #6)
Gavel of the Righteous (New Capenna Commander #83)
Hand of Vecna (Adventures in the Forgotten Realms #246)
Lothlórien Blade (Tales of Middle-earth Commander #77)
Luxior, Giada's Gift (Streets of New Capenna #240)
Murderer's Axe (Shadows over Innistrad #259)
Nightmare Lash (Mirrodin #219)
Pact Weapon (Commander Legends: Battle for Baldur's Gate #139)
Pirate Hat (The Lost Caverns of Ixalan #70)
Piston Sledge (Mirrodin Besieged #124)
Robe of the Archmagi (Commander Legends: Battle for Baldur's Gate #91)
Sigil of Distinction (Shards of Alara #219)
Steelclaw Lance (Throne of Eldraine #202)
Team Pennant (Strixhaven: School of Mages #260)
Veteran's Powerblade (The Brothers' War #41)

Though this query has ended, its relics still slumber in New Argive.