Champion's Helm {3}
Artifact — Equipment
Equipped creature gets +2/+2.
As long as equipped creature is legendary, it has hexproof. (It can't be the target of spells or abilities your opponents control.)
Equip {1}
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Cards that do something similar expected a card that isn't here?
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Bilbo's Ring 87%
$14.93#5068
"During your turn, equipped creature has hexproof and can't be blocked."
+1 more matching line
Idol of the Deep King // Sovereign's Macuahuitl 99%
$0.14#19780
"Equipped creature gets +2/+0."
+1 more matching line