Guardian Beast 
Creature — Beast
$615.00 #25111 0.82 32.7 years
As long as this creature is untapped, noncreature artifacts you control can't be enchanted, they have indestructible, and other players can't gain control of them. This effect doesn't remove Auras already attached to those artifacts.
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Cards similar to Guardian Beast expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Spectral Guardian82%
$0.75↓#30507↓0.07↓29.9 years↓
"As long as this creature is untapped, noncreature artifacts have shroud."
Darksteel Forge72%
$41.16↓#1422↑0.97↑22.6 years↓
"Artifacts you control have indestructible."