Mashup: the Gathering Workbench: Virtual Booster

Celestial Glider    R  Creature – Griffin Flying, vigilance Discard a card: Exile target flying creature blocking Celestial Glider. And up and up the Dragon flew, and up and up the Griffon. The air grew weak and breath was few, but neither one would give in. -From "Why Griffin Flies High" 4/4	Wreckage Skimmer    U  Creature – Cephalid Wizard When Wreckage Skimmer enters the battlefield, return an instant or sorcery from your graveyard to your hand. , Shuffle Wreckage Skimmer into your library: Prevent all combat damage damage that would be dealt this turn. 2/3	Institute of Arcane Sewers    U  Land , : Add to your mana pool. : Until end of turn, Institute of Arcane Sewers becomes a 1/1 blue and red Merfolk Wizard with ": Institute of Arcane Sewers deals one damage to target creature or player."	Protect the Master    U  Instant – Trap If your opponent controls an attacking creature with power greater than the number of cards in your hand, you may pay rather than pay Protect the Master's mana cost. Put two 3/3 white Djinn creature tokens with flying into play.	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
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.	Thanatos Drake    C  Creature – Drake Flying , , Exile a card from your graveyard: Target player discards a card. Activate this ability only any time you could cast a sorcery. 2/4	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.	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	Talruun Firebrand    C  Creature – Minotuar Warrior When Talruun Firebrand enters the battlefield, it deals 3 damage to all players. Quiet! I cannot promise victory for our tribe, but I will promise an end to the fighting! 3/3
Harmonic Vale    C  Enchantment As Harmonic Vale enters the battlefield, choose a color. Whenever a player casts a spell of the chosen color, you may pay . If you do, you gain 2 life.	Explosive Shoots    C  Sorcery As an additional cost to cast Explosive Shoots, sacrifice a land. Search through your library for a basic land, put it onto the battlefield, then shuffle your library. Each player gains 1 life for each basic land type they control, then Explosive Shoots deals 3 damage to each player.	Wicked Witch Engine    C  Artifact Creature – Elemental Horror : Target player dealt damage by Wicked Witch Engine this turn loses 1 life. 2/2	Blessing Unbent    C  Instant As you cast this spell, you may untap two tapped white creatures. When you do, copy it and you may choose a new target for the copy. Target creature gains +2/+2 until end of turn.	Plains    B  Basic Land – Plains

Celestial Glider (rare)
Wreckage Skimmer (uncommon)
Institute of Arcane Sewers (uncommon)
Protect the Master (uncommon)
Plume Serpent (common)
Curio Curse (common)
Thanatos Drake (common)
Book Slide (common)
Kyren Tax Collector (common)
Talruun Firebrand (common)
Harmonic Vale (common)
Explosive Shoots (common)
Wicked Witch Engine (common)
Blessing Unbent (common)
Plains (basic)