Would an enchantment creature cast as an aura remain on the field if creature it is attached to dies or would it go to graveyard as a normal enchantment? Verbiage in bestow wording is what causes me to ask this
Example card baleful eidolon
Yes, that's what the "It becomes a creature again if it's not attached to a creature" part of Bestow's reminder text is trying to inform. If Baleful Eidolon is an aura enchanting a creature and the creature dies, Baleful Eidolon becomes unattached and, rather than going to the graveyard, it just stops being an Enchantment - Aura to start being an Enchantment Creature.
This is specific to cards cast with bestow however, if another creature were to somehow become an aura and attaches to a creature, like say dominating licid and the creature it enchants dies, the aura goes to the graveyard as normal.
Example card baleful eidolon