If Silent Hallcreeper leaves the battlefield and then returns to the battlefield later, it will be a new object with no memory of the modes that were chosen when it was last on the battlefield
It's great for bouncing with the help of Kor Skyfisher and Glint Hawk, makes for good sacrificial fodder to Deadly Dispute, Kuldotha Rebirth, and Krark-Clan Shaman, and can even just be re-equipped if your creature dies
A Tweet from Maximum Cards & Collectibles, a store in Whitby, Ontario, shows the card before it was graded and that it has a connection to our little store in Whitby! The store followed up that Tweet with another clarifying that the card wasnt pulled in the store, but was opened by one of its customers
In cube at present I think this is the best flip card although the jury is still out on the new Garruk
Match it to a known reference
And a powerful potential Commander, amiright