Artifacts you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)
At the beginning of your upkeep, if you control the artifact with the greatest mana value or tied for the greatest mana value, draw a card.
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Padeem, Consul of InnovationPromoKaladesh · 59 · rare$11.55
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The Ur-DragonTextured Foil1065 · mythic$236.69
Deflecting SwatBorderless698 · rare$104.90
Demonic TutorBorderless696 · mythic$92.87
Selvala, Heart of the WildsTextured Foil1064 · mythic$87.13
Mikaeus, the UnhallowedTextured Foil1061 · mythic$85.52
Jeweled LotusBorderless702 · mythic$83.08
Fierce GuardianshipBorderless694 · rare$76.35
Deflecting Swat214 · rare$73.53
Smothering TitheBorderless693 · mythic$71.26
Demonic Tutor150 · mythic$64.81
Fierce Guardianship94 · rare$64.37