The four cards that this affects are: Angler Turtle, Rampaging Brontodon, Soul of the Harvest (actually from the M16 gift pack, in Arena through Jumpstart), and Vengeant Vampire. These cards are legal in Pioneer, and therefore should be legal in Explorer, but are not.
The four cards that this affects are: Angler Turtle, Rampaging Brontodon, Soul of the Harvest (actually from the M16 gift pack, in Arena through Jumpstart), and Vengeant Vampire. These cards are legal in Pioneer, and therefore should be legal in Explorer, but are not.