Echoes of Eternity actually doubles things in two ways, both your Eldrazi themselves and the effects you get when casting them
It was purchased purely out of necessity since I was not able to find the raw copy of this card at my desired price point
I know it would be very easy to make this into an Angel deck, but I really wanted to open it up to all flyers to make the deck diverse (and less boring, because typal decks make me wanna snooze)
Were talking about cards like Jace, the Mind Sculptor and Mox Opal, not just Standard hits like Hydroid Krasis and Kayas Wrath
Because all attacking creatures are chosen at once, a creature returned this way can't attack during the same combat as it returns, even if it has haste
The problem here is that their late-game is better than ours