When the enchanted creature leaves the battlefield, the Aura with bestow will stop being an Aura and go back to being a creature on the battlefield
Nazgl Battle-Mace Yes, Nazgl Battle-Mace costs about the same as an eldrazi after you cast and equip it, but equipment has a knack for getting around those costs
6 Engraved Sides featuring -1/-1, -2/-2, -3/-3, -4/-4, -5/-5, and -6/-6
This is probably fine
The green in the hybrid mana symbol means you cant pack this into your Brago, King Eternal decks, but it also means Emiel slots easily into Selesnya counters decks on top of all the decks that just want a flicker effect like Bruse Tarl, Boorish Herder and a partner like Thrasios, Triton Hero
One of the biggest shakeups to Magic: The Gathering's identity in recent years was the introduction of 'Showcase Frames'