These cards typically had a brown and black artwork window, higher attack damage and lower HPs compared to normal Pokmon
PHYREXIA ALL WILL BE ONE: MULTICOLOR, ARTIFACTS AND LANDS Atraxa, Grand Unifier is essentially Niv-Mizzet Reborn without the red
The artwork frame on a Shadowless card sits flat with no depth, no gray bar on the right edge of the art box
"Flashforward [cost]" means "You may cast this card from exile by paying [cost] rather than paying its mana cost" and "If the flashforward cost was paid, put this card on the bottom of its owner's library instead of putting it anywhere else any time it would leave the stack." You must still follow any timing restrictions and permissions, including those based on the card's type
In addition to foil and non-foil printings, some of WOEs alt arts have the confetti foil treatment
For most players, that is a feature, not a bug