Remember that once the activation resolves, the Mirror wont have the second ability, so if there are tricks to do, activate it twice and then do said tricks between resolutions
Unfortunately, Garchomp cannot use Special Energy like Double Rainbow or Scramble Energy (these turn off its PokeBody), so it takes quite awhile to get off of the ground
Ambition's Cost AND Ancient Craving Get ready for your Super Secret Tech
Based around scrying and casting high value instants and sorceries, Elminster's static ability reduces the mana cost of the next instant or sorcery you would cast by the number of cards you looked at the last time you scried
Personally, with Chasm Skulker being one of my pet cards from M15 Im most excited to see if gaining 2 counters per turn is enough to put it over the top in some kind of UGx shell
Chart shows the price of Crabominable V #26 at the end of each month going back as long as we have tracked the item.