Mashup: the Gathering Workbench: Virtual Booster

Riddle of Snakes    R  Instant – Trap Reveal cards from the top of your library until you reveal two nonland cards with a converted mana cost of four or less. You may cast them without paying their mana cost. Shuffle your library, then, if an opponent cast a blue or black spell this turn, put Riddle of Snakes into your library third from the top.	Seasonal Front    U  Sorcery Choose one – Search your library for X basic lands, put them onto the battlefield, tapped, then shuffle your library; or, destroy X target lands. Entwine (Choose both if you pay the entwine cost.)	Roiling Fire    U  Sorcery When you cast Roiling Fire, exile it from the game with X time counters on it. At the beginning of your upkeep, if Roiling Fire is exiled, remove a time counter from it. If you do, deal 5 damage to target creature.	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.	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
Monsivore Rex    C  Creature – Lhurgoyf First strike Monsivore Rex gets +1/+0 for each Mountain you control and for each Mountain in your graveyard. "Oh, Saffi! Must you overreact to -" - Hans Eriksson, last words. 0/1	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	Steadfast Assault    C  Sorcery Deal 1 damage to all creatures your opponents control. Creatures you control get +0/+3 until end of turn. Ha! Conviction? Your 'noble spirit' might win wars, but first you'll need to keep your flesh intact.	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	Blightsoil Druid    C  Creature – Elf Druid , Pay 1 life: Add to your mana pool. "The land belongs to the murk as far as the eye can see. The deeper you sink, the more you can see." 1/2
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.	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.	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.	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.	Swamp    B  Basic Land – Swamp

Riddle of Snakes (rare)
Seasonal Front (uncommon)
Roiling Fire (uncommon)
Unnatural Fever (uncommon)
Corona of Power (common)
Monsivore Rex (common)
Turn to Brambles (common)
Steadfast Assault (common)
Thanatos Drake (common)
Blightsoil Druid (common)
Blessing Unbent (common)
Prismatic Surge (common)
Book Slide (common)
Curio Curse (common)
Swamp (basic)