It only uses cards with the true partner mechanicno partner with, backgrounds, or any of the other partner offshoots
How can I determine what the card says
Like most Pokmon cards, the value of Sharpedo depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Secret Wonders)
Marrow-Gnawer sac-loop: tap Marrow-Gnawer, sacrifice one Rat, make a token for every Rat you control then swing with fear for a one-sided alpha strike
In the case where Fealty to the Realm is enchanting a creature but there is no monarch, the second ability will create a control-changing effect with the timestamp mentioned above, but that effect won't do anything until a player becomes the monarch
First Edition cards have a small "Edition 1" oval stamp printed on the card