Add to that Persecution's relevance in a variety of other matchups, notably against Spirit tokens that clog up Abzan mirrors, and you have a card with great maindeck potential
This means that this effect can snowball out of control quite quickly, as these copies will begin to generate additional copies themselves
- A Game of Thrones (LCG), A Place in the Sun, A Spoiled Victory: Dunkirk 1940, Acquire (new version), Adellos, Advanced Guildhall Fantasy: The Gathering, Adventure Mart, Adventure of D, Aeon's End, Aeon Trespass: Odyssey, Agents of SMERSH, Akrotin, Alicematic Heroes, Alien Artifacts, Alien Frontiers, Aloha: The Spirit of Hawaii, Among Thieves, Amphipolis, Andromeda's Edge, Animix, Anomaly, Arcadia Quest (Hero and Monster cards), Archer: Once You Go Blackmail..., Archmage, Arcs, Area 1851, Arena: For the Gods!, Arena: The Contest, Argoat, Ark Nova, Art of War: The Card Game, Ascenscion: Deckbuilding Game, Assault: 19xx, Assault of the Giants, Astoria, Aura, Ausonia, Autumn Harvest: A Tea Dragon Society Game, AuZtralia, Axis & Allies & Zombies
To this end, Brian Hacker actually played 61 cards in his Tempest Block Constructed Humility/Prayer deck, so as to not have to worry about resolving a Grindstone, if push came to shove
