I like idea of grabbing a creature (let's say a Agent of Treachery) and putting on the battlefield and it happens to cost 7 mana
Still, despite getting crushed, he's easily one of my favorite commanders this year
I also really like the artwork for Anarchy, featuring a very nice artwork showing the change of environment as the shaman casts his spell -- volcanic temperate climate on one half, and featureless snow on the other
Its easy to look at Gargos, Vicious Watcher, Animar, Soul of Elements, or Kruphix, God of Horizons with each of their different ways of supporting the hydra tribe and wish that there could be one unifying general tying them together
any number of fatties can hit the field and immediately grant you that free spell
Not to mention she'll be pulling in lore while providing this solution