The kicker is that when one of your creatures dies, opponents lose one life, and when an opponent's creature dies, you gain 1 life
MTG has many mechanics that revolve around artifact numbers and density, so we have not only affinity cards here, but also improvise, metalcraft, and other artifact-matters mechanics and cards
Instead of entering the battlefield as an Aura, the effect making it an Aura spell ends, it loses enchant creature, and it resolves and enters the battlefield as an enchantment creature
Its super effective as a Voltron commander because it gets to attack four times a turn cycle, so you basically get three additional combats a turn
Its a fantastic way to protect your party members and continue to reap the benefits of having a full party