Finding the balance where a planeswalker can be relevant in a game without being overpowered is hard to get right on the first try
The alternate art, borderless versions of the Crystal cycle can be found in Play boosters or Collector boosters
5 Sid Phillips Toy Surgeon Playtime's Over is a unique ability that allows you to banish one of your own characters, forcing your opponent to choose and banish one of their characters as well
Then when it ETBs, you can phase out any number of other dorks from the battlefield, also to answer the same stuff, but this will answer things the indestructible former one gives like mass bounce of Cyclonic Rift or Aetherize, or exiling of Farewell or -X/-X of Mutilate or sacrifices of Living Death
Grothama is an interesting leader, possibly handing out card advantage at the cost of other creatures
It's possible to discover split or double-faced cards