Sadly, this likely means that Seluma, Light of Aysen is going to be outrageously expensive, even once Mystery Booster Command Edition launches
A real strength of this card is its ability to mess with so many random cards your opponents might be playing, from Elspeth Conquers Death to The Great Henge
This is here to enable Harmonize, but I'm a little skeptical you want to play a creature with very mediocre stats and a rummage trigger
Classics mass pumps like Moonshaker Cavalry and Craterhoof Behemoth turn your many 1/1 creatures into a winning attack
You can bring it in for control mirrors after theyve taken out most of their removal or against aggro decks to have a massive brick wall that they cant get through
Each card in the Planar Deck adds a rule for every player in the game, representing the plane they are doing battle on