Hard to tell
The League The first order of business was to pull up the card database and search for Planeswalkers ranked by casting cost in order to start eliminating those that wouldnt really work for whatever reason
You can give creatures you dont control -2/-0 until the end of the turn, you can create a taped Powerstone token, you can make a 0/0 Construct creature that has +1/+1 for each artifact you control or you can scry 1 and then draw a card
I like the effect on We've got two more weather effects, and We've got two more 'named' characters in Special mention, I guess, goes to Ghazban Ogre, where it's such a treacherous creature that it hops to whoever is the stronger player right now
Heliod, Sun-Crowned Heliod, Sun-Crowned deserves mention as a combo enabler
The Cycle ability to draw a new card and make two Treasure is the real reason it is in the deck