The game has random effects and Ive figured the best way to emulate that is to play them as Random Receiver card: Reveal cards from the top of your deck until you reveal a Supporter card
That is amazing for those players that are staring down defeat, only for them to draw up a full hand of cards and gain enough life to get them through the next turns
To the uninitiated, that might sound like how Yu-Gi-Oh
Exile effects rarely target cards that are exiled, it's much more common the target would be in the library, graveyard or on the battlefield
The acorn cards allow the set to break the rules of normal Magic and allow the designers to try things that expand on the usual Un-set gameplay
Islandwalk, Swampwalk, Mountainwalk, and Forestwalk all appeared in Alpha , while Plainswalk wouldnt appear until Legends and has been used much more sparingly than the others