Helm of the Lost Duke

Equipped creature gets +2/+2 and has hexproof.
(It can't be the target of spells or abilities your opponents control.)

Equip Skeleton {1} ({1}: Attach to target Skeleton
you control. Equip only as a sorcery.)

Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.)