Venture to Theros, plane of heroes, gods, and monsters. Here, hydras, gorgons, and satyrs of myth roam in a wild, mystical world, while the brave venture far beyond city walls to untamed lands and raging seas. Will divine oracles chart your destiny, or will you take matters into your own hands?

The Challenge Deck is a special self-running deck with its own set of rules. Players are encouraged to pilot it against one another one-on-one or in groups of up to four with guidance from the included instructional playmat. The Challenge deck contains 60-cards (18 Heads and 42 Sorcery cards). The 15 unique cards are not legal in regular Magic, which is made clear by
their different card back. Some of the Heads have the supertype elite. When playing against this deck the player may use their Hero cards. The Hydra follows a predetermined sequence of casting cards from its shuffled deck and blasting the player for damage. The goal is to eliminate all of the Hydra heads before it eats you. When you cut one head down, sometimes more grow back. If you win against the challenge deck, you win a third Hero card (The Slayer).

Decklist:

Creatures(18)
• 11 Hydra Head
• 4 Ravenous Brute Head
• 1 Savage Vigor Head
• 1 Snapping Fang Head
• 1 Shrieking Titan Head

Sorceries(42)
• 5 Disorienting Glower
• 5 Distract the Hydra
• 4 Grown from the Stump
• 4 Hydra's Impenetrable Hide
• 3 Neck Tangle
• 4 Noxious Hydra Breath
• 2 Strike the Weak Spot
• 5 Swallow the Hero Whole
• 4 Torn Between Heads
• 6 Unified Lunge