Red and Green is a great combination for a lot of things, but its beginning to feel a bit like Boros when it comes to commanders
You can find the regular Japanese Mystical Archive cards in Japanese Play Boosters and Japanese and non-Japanese Collector Boosters, and the silver scroll foil Japanese Mystical Archive cards, which can only be found in Collector Boosters
There are still small piles of SP copies on SCG and TCG at the time of this write up, and those seem like a good place to go deep
Im a personal fan of the phoenixes that play into a certain archetype or mechanic, like Ashcloud Phoenix and morph or Spellpyre Phoenix and cycling
By tying the mechanic to beginning of combat, it helps communicate the flavour of the mechanic, while also lowering the complexity of the mechanic from "any time during an opponent's turn" to "before combat"
If you just cast it on turn 3 and follow up with a huge creature on turn 4, copying that creature will already have paid you off for taking the time to cast her