Mind Shatter is a powerful intoxicant of awesome for your brew
The spirit of the rules would seem to suggest that these cards are the colors of both faces for deck construction purposes, but not only are these spells always cast as the front face, the front face is the only one 'seen' in other game zones: for instance, when the card's in the library, you could find Elbrus by searching your library for an artifact, but you couldn't find Withengar Unbound by searching your library for a creature card
The triple red might be a problem in a three-color deck, but totally worth making the effort
This constant pressure forces awkward switches and softens targets, which pairs perfectly with Cyrus to drag wounded Pokmon back for a finish
Once you have a massive board state, cards like Warleader's Call and Imodane's Recruiter help push a bunch of damage to finish the game
That is new territory for Esper, and that means you can take decks that care about combat and care about churning through the deck for card selection and combine them