Mashup: the Gathering Workbench: Virtual Booster

Break Spirit    R  Sorcery Double Dip when a permanent enters the battlefield under an opponent's control (If you cast this spell from your hand, exile it when it resolves. When the double dip condition is met, you may cast it from exile without paying its mana cost.) Destroy target permanent.	Niven's Battlestone    U  Artifact When Niven's Battlestone enters the battlefield, target red creature can and must be blocked by exactly two creatures this turn. : Add to your mana pool. , , Sacrifice Niven's Battlestone: Destroy all non-land permanents with a converted mana cost of three or less.	Dogwood Elder    U  Creature – Treefolk Spellshaper : The next time you would draw a card, instead, put the top three cards of your library into your graveyard. If you do, destroy target artifact or enchantment. If a permanent is destroyed in this manner, put a +1/+1 counter on Dogwood Elder. 3/3	Stronghold Ruins    U  Land : Add to your mana pool. , Sacrifice Stronghold Ruins: Add to your mana pool.	Book Slide    C  Instant When you cast Book Slide, X cannot be more than the number of attacking and blocking creatures on the battlefield. Draw X cards. Each day, the Librarians of Lat-Nam fight against the growing tide of books. The books are winning.
Corona of Power    C  Snow Snow Snow Enchantment – Aura Enchant green creature. Enchanted creature gains ": Deal damage to target player equal to this creature's power. I call on forest's strength – on every thorn on every bramble – for their mass to break our enemies. -from The Fire within All	Shade of Prey    C  Creature – Bird Shade Flying Sacrifice a land: Return Shade of Prey to its owner's hand. : Shade of Prey gets +1/+1 until end of turn. 2/1	Pull of Pyromancy    C  Enchantment When Pull of Pyromancy enters the battlefield, put a 3/3 Red Elemental creature token onto the battlefield. At the beginning of each player's upkeep, Pull of Pyromancy deals 1 damage to that player, unless he or she controls an Elemental.	Curio Curse    C  Enchantment – Aura Enchant Creature When enchanted creature deals damage to a player, look at the top three cards of your library, put one in your hand, put the rest back in any order, then sacrifice Curio Curse. Enchanted creature must attack if able.	Kyren Tax Collector    C  Creature – Goblin Advisor Haste If an opponent controls more lands than you, you may play Kyren Tax Collector without paying its mana cost. In Mercandia, there's a tax for future land you will buy. 1/1
Learned Response    C  Instant You may pay 1 life and exile a blue card from your hand rather than pay Learned Response mana cost. Counter target non-creature spell.	Cho-Arrim Augury    C  Instant If an opponent controls a Swamp, and you control a Plains, you may cast Cho-Arrim Augury without paying its mana cost. Draw a card, then put a card from your hand on top of your library. Then look at the top four cards of your library and put them back in any order.	Plume Serpent    C  Creature – Serpent When Plume Serpent enters the battlefield, you may search your library for an Island card and put it onto the battlefield tapped under target player's control. If you do, shuffle your library. Plume Serpent can't attack unless defending player controls an Island. 6/5	Steaming Sink Pits    C  Enchantment – Aura Enchant Land Enchanted Land is a Swamp and Mountain. Whenever enchanted land becomes tapped, that land deals two damage to its controller.	Forest    B  Basic Land – Forest

Break Spirit (rare)
Niven's Battlestone (uncommon)
Dogwood Elder (uncommon)
Stronghold Ruins (uncommon)
Book Slide (common)
Corona of Power (common)
Shade of Prey (common)
Pull of Pyromancy (common)
Curio Curse (common)
Kyren Tax Collector (common)
Learned Response (common)
Cho-Arrim Augury (common)
Plume Serpent (common)
Steaming Sink Pits (common)
Forest (basic)