The riot mechanic gives you the ability to choose to either give your creatures haste for a more aggressive approach, or give the creature a +1/+1 counter to make it stronger
Surrak and Goreclaw Though there are cheaper ways to give your creatures +1/+1 counters when they enter (Good-Fortune Unicorn comes to mind), Surrak and Goreclaw distinguishes itself by giving them haste
Traditional foil and halo foil ghostfire cards are available only in Tarkir: Dragonstorm Collector Boosters
I personally love the original cycle of experience counter commanders, so its extra sweet to see this excellent annihilator card come along too
Creature - Human Soldier Filigree Vector When this creature enters, put a +1/+1 counter on each of any number of target creatures and a charge counter on each of any number of target artifacts
While Aang's head acts as a stand-in for the TLA set, the non-standard legal TLE cards can be spotted by Aang's iconic Air Glider