On cards printed starting with The Brothers War release, that symbol is a single white triangle pointed upward inside a black circle
This makes it a damage spell and a damage prevention effect all in one, a perfect card for a burn sideboard
The combination of limited-edition direct-sales product line and non-fantasy outside IP touched a lot of nerves, but the really big precedent was the decision to print these as mechanically unique, tournament-legal cards ensuring that Rick, Steadfast Leader would soon go down in history as an unlikely staple of tournament Magic
Part 10: Foil Errors Foil Cut lines: These are the result of the old foiling process
If you look at other similar games, most quickly died off
Its honestly kinda neat that this card has been so good for so long, through so many formats