The first paper Vintage Masters set would have likely arrived at some point in 2014, bringing down prices for dual lands, City of Traitors, Lions Eye Diamond, and others before the first round of crazy Reserved List spikes caused them to go absolutely nuts
(Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Destroy target creature or planeswalker
And the story from the creative side was already moving in a different direction
Now, your opponents can respond to you paying six energy, but given you can do this at any time, you can choose when the best moment is to cash it in
Its incredibly easy to set up a board state full of creatures, then play a Consuming Tide to get a whole stack of Taeko triggers, before swinging in for lethal commander damage with an unblockable Turtle
Cloud Moogle is an incredibly underwhelming card, but what it implies is a bit more interesting