Bilbo's Ring

As long as it's your turn, equipped creature has hexproof and can't be blocked.
Whenever equipped creature attacks alone, you draw a card and you lose 1 life.
Equip Halfling (: Attach to target Halfling you control. Equip only as a sorcery.)
Equip (: Attach to target creature you control. Equip only as a sorcery.)