2017-02-09 Even though Metallic Mimic is a Shapeshifter, other Shapeshifter creatures you control won't get a +1/+1 counter unless you chose Shapeshifter as Metallic Mimic entered the battlefield
Obviously these may be a miss for your format for other reasons (power, archetype mismatch, rarity, don't run planeswalkers etc) but here's a few that I found interesting, divided by broad category rather than color: Actual Modal Dual Faced Cards: While I'm still not done reading Cosima, God of the Voyage (I'm on chapter 2, the language is a bit dense) these cards are ones I do like both sides of
Izzet spellslinger is hardly a fresh archetype, but Rootha
When you enter the top32, a new tournament starts
And that's not at sorcery speed or once per turn, you can do it in response to removal and just once
The most unusual thing about the Turtle deck is that it is Rainbow - using all 5 colours of mana (resource), which would typically dilute a deck to being unplayable (MTG Commander decks are at most 3 colour, ordinarily) - but is not only playable, but really good fun, with the turtles plus splinter (black) covering the 5
