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}
Legalities
tlrlegal
duellegal
brawllegal
pennynot legal
PreDH
Rulings · 1
wotc
It's possible for a Champion's Helm you control to be attached to a creature an opponent controls (if an opponent gains control of your equipped creature, for example). In this case, the creature couldn't be the target of spells or abilities you control, as you are an opponent of the controller of the creature with hexproof.
Notes
No price observations yet — this card is in the canonical catalog but a refresh hasn't seen a market price.
