The card was originally printed in a set infested with werewolves, but works with Clive, Ifrit's Dominant or any transforming summon
As an aside, the Signets are significantly worse being that much more awkward to use immediately
If you open a Rhystic, you think, Hey, I have a Commander deck that can use this
The thing the serpents are fighting with on both faces of the card is the foot of a Phyrexian which is obviously significantly larger
If you print a 72 DPI image on a physical card, it will look blurry, pixelated, and "cheap." To achieve the crisp, sharp text found on authentic MTG cards, you must design your file at 300 DPI (High Resolution) or higher
A Grim Monolith, from Urza's Legacy, Near Mint and English