Mashup: the Gathering Workbench: Virtual Booster

Isochron Hipparion    R  Creature – Horse Wizard When Isochron Hipparion enters the battlefield, you may exile a creature from your hand with a converted mana cost of 3 or less. : Isochron Hipparion gains all activated abilities from the exiled creature. "Hipparions are to warriors what aesthir are to skyknights." - from the thesis of Cadet Jarkeld 1/3	Unnatural Fever    U  Enchantment Creatures you control get +2/+0. At the beginning of the end step, sacrifice Unnatural Fever, then gain 4 life for each tapped creature you control.	Dawnfield Puredeer    U  Creature – Deer , Sacrifice Dawnfield Puredeer: If a source would deal damage to you or a creature you control this turn, prevent 1 of that damage. , Sacrifice Dawnfield Puredeer: If a source would deal damage to you or a creature you control this turn, prevent 2 of that damage. 2/2	Gilded Hulk    U  Artifact Creature – Golem At the beginning of your second main phase, if Gilded Hulk attacked, add three mana of any color to your mana pool. I tried, once, to give one a soul. I had to remove it again when the creature went berserk. -Volrath 5/4	Turn to Brambles    C  Instant Target creature becomes a 2/3 green Plant Wall with defender and ": Regenerate this creature." until end of turn. Wrap arms and roots together, be convulsed with grief, and bring back chaos out of shape. - Conrad Aiken, The Room
Claws of the Viashino    C  Enchantment – Aura Enchant creature you control Flash : Enchanted creature gets +1/+0 until end of turn. Return Claws of the Viashino to its owner's hand: Sacrifice the enchanted creature and add to your mana pool.	Walking Nightmuse    C  Creature – Spirit Creatures can't block Walking Nightmuse unless their controller discards a card for each creature he or she controls that's blocking Walking Nightmuse. 4/2	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.	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.	Prismatic Surge    C  Instant As an additional cost to casting Prismatic Surge, discard a card. Target creature gets +X/+0 where X is equal to the discarded card's converted mana cost, and has protection from the colors of the discarded card.
Creative Eyry    C  Instant When you cast Creative Eyry, cannot be greater than the number of flying creatures you control. Draw X cards.	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.	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	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	Swamp    B  Basic Land – Swamp

Isochron Hipparion (rare)
Unnatural Fever (uncommon)
Dawnfield Puredeer (uncommon)
Gilded Hulk (uncommon)
Turn to Brambles (common)
Claws of the Viashino (common)
Walking Nightmuse (common)
Book Slide (common)
Cho-Arrim Augury (common)
Prismatic Surge (common)
Creative Eyry (common)
Steaming Sink Pits (common)
Plume Serpent (common)
Kyren Tax Collector (common)
Swamp (basic)