Every Play Booster pack guarantees at least one foil card, though if you're chasing whatever ultra-rare alternate art treatments Wizards of the Coast has tucked away, your odds will likely still be much better with the considerably more expensive Collector Boosters, which are unfortunately out of stock right now
Remove this card from your deck before playing if you are not playing for ante. Other examples of ante cards in Magic: The Gathering include Jeweled Bird, Rebirth, Timmerian Fiends and Bronze Tablet
Its a true indicator of its overall condition and energy level
Take a look at the alternate art for Void Beckoner as an example
On the flip side, it can also just be a 3-mana 1/1 with Ward 2, not something you should be interested in
The advantage Map has over those things are the three scry you get prior to than point and the control you get within the one card