Bestow is different and has your back in two ways: First, if the Aura spell ends up having an illegal target, rather than not resolving like other Aura spells would, Aura spells with bestow will instead stop being Aura spells, go back to being enchantment creature spells, and continue to resolve
Assuming you're building a paper cube and not something meant for digital play, you're going to need the physical copy of the cards you intend to play
Four mana to destroy a creature or planeswalker is playable, but not exciting
Waterbenders Restoration is an option I like quite a bit
A new type of card, an item card, features the Magic Mirror. Very mysterious
Product Desription: Flying Sacrifice another creature or artifact: Put a +1/+1 counter on Evereth, Viceroy of Plunder