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It can get really messy, so let me clear the air before we get any further

Materials: Paper / plastic Recommended Age: 6+ Years

Whenever you cast your first spell during each opponent's turn, you may tap or untap target nonland permanent

These variant cards work perfectly with the contents of your Hidden Arsenal packs

When an opponent's monster declares an attack: You can Special Summon 1 "Gladiator Beast" monster from your Deck, and it cannot be destroyed by battle

Some people categorize this as "power creep," but it's a longform version of ludic evolution--the progression from Ravenous Baloth to Questing Beast sells packs, excites players, and gives old heads the opportunity to reminiscence and kvetch