Try lands.
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Try actually BUILDING a deck!
In my opinion, Planeswalkers are in general too threatening to be played. While they all are very good, most people tend to overreact when they hit the field and either gang up on the person who played the plainswalker or do whatever possible to remove it from the board. It actually is reasonably easy to remove Plainswalkers, Oblivion Ring and Rootgrapple work quite nicely here. Check out my treefolk deck for a deck that actually is quite fast.