You can get 3-drop or 4-drop Boros commanders like Tajic, Legion's Edge or Osgir, the Reconstructor out by turn 2 as long as you play a Plateau into a Sol Ring and then use that mana to cast an Arcane Signet
Its a fairly safe mechanic that rewards single or two-color deck building, especially in Limited formats so it would be safe to say this mechanic is likely returning as well
And once you got Recurring Nightmare going, you could recycle the creatures you discarded and reuse their effects multiple times
We also have an entire series of creatures that have Adventures attached to them, which mean that you can actually get spells into your creature decks and be able to use this Companion
Whether you're cracking packs on the couch or hunting down that dream pull, Ninja Spinner is a set you won't want to miss
These cards sit above the standard set numbering, which is why you will see them stamped with figures like 134/132 or 099/094