14 cards where the text includes “indestructible” and the card types include “artifact” and the mana value >= 6

Avacyn's Memorial (Midnight Hunt Commander #31)
Blightsteel Colossus (Double Masters #235)
Blitzwing, Cruel Tormentor // Blitzwing, Adaptive Assailant (Transformers #4)
Blitzwing, Cruel Tormentor // Blitzwing, Adaptive Assailant (Transformers #4)
Colossus of Akros (Theros #214)
Darksteel Colossus (Foundations #671)
Darksteel Forge (Double Masters #248)
Darksteel Gargoyle (Duel Decks: Mirrodin Pure vs. New Phyrexia #19)
Darksteel Monolith (Commander Masters #743)
Darksteel Sentinel (Duel Decks: Mirrodin Pure vs. New Phyrexia #16)
Kaldra Compleat (Commander Masters #958)
Necron Monolith (Warhammer 40,000 Commander #161)
Salvation Colossus (Modern Horizons 3 Commander #43)
Soul of New Phyrexia (Commander Masters #974)
Ultra Magnus, Tactician // Ultra Magnus, Armored Carrier (Transformers #15)
Ultra Magnus, Tactician // Ultra Magnus, Armored Carrier (Transformers #15)

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