ICv2: 'Flesh and Blood: Mastery Pack Guardian' Heads to Retail Contract from Below is one of very few ante cards in Magic: The Gathering. Ante refers to a method of play that requires each player to put one or several cards Guardian mains this one's for you! Flesh and Blood just launched a brand new product line called Mastery Packs. These are booster sets that focus entirely on one hero class at a time. Flesh And Blood Crucible Of War Guardian Crush The Weak YELLOW set New eBay