They make a set together with the third card from earlier in the list
While five colors commanders have (thankfully) become more narrow as time has gone on, there are those still able to generate huge amounts of value or just be a pile of good stuff if you want like Kenrith the Returned King
The Riparian Tiger allows you to keep attacking, turn after turn, and apply pressure
Reassembling Skeleton can be on the battlefield or in the graveyard
X is a really powerful card, I would wait later into the game when my opponent has a full bench so I can fully utilize Garchomp's Poke-Power and the same goes with using Restore, you would probably have a better chance of being able to return a powerful Pokemon to your bench if the game has gone on for awhile already
If you receive a card style for a card currently not in your collection, you will need to acquire the card first before you can apply the style to it