hey there, me and my buddy were going through his magic cards and we found this odd card by the Hildebrandts. If anyone could explain why its combined two cards in one and from what set or if its a promo?

Cheers,
Jc

The card is uncommon card from the Apocalypse Magic: The gathering set. The mask is expansion symbol. The color of the mask (silver) means it is uncommon. The card itself is part of the base set. There are many "split" cards in Magic: The gathering where you can chose to do one thing or another on the same card. The Hildebrandt brothers have several cards throughout Magic: the Gathering.