Each opponent loses X life, where X is the number of creature cards in your graveyard
Topic on the forum Images Back - Alternate Fourth Edition Cards SET NUM CARDNAME ARTIST SOURCE DATE 001 Standard Fourth Edition card backside Source unknown 1995 002 Alternate Fourth Edition card backside Source unknown 1995 Images Light - Alternate Fourth Edition Cards SET NUM CARDNAME ARTIST SOURCE DATE 001 Four standard Fourth Edition cards and an Alternate Fourth Edition card under normal light Source unknown 1995 002 Four standard Fourth Edition cards and an Alternate Fourth Edition card under ultraviolet light Source unknown 1995
In other words, follow the legality of the Magic version, and note that none of these cards currently appear on any format ban lists
If the Jeskai route makes the most sense, a 1/1 that should immediately gain you life, and be expendable at the same time fits nicely is a battalion setting
You choose which opponent or planeswalker controlled by an opponent each token is attacking as it enters the battlefield
There is only one copy , as the other copies from the print run have been destroyed