Mashup: the Gathering Workbench: Virtual Booster

This booster was generated with modern collation since the cardset contains mythics: 1 rare / mythic, 3 uncommons, 10 commons, 1 basic land.
You could alternatively have 15 random cards regardless of rarity.

Arena Walls R Enchantment At the beginning of your upkeep, lose 1 life. At the beginning of each opponent's upkeep, they may choose to skip their draw phase this turn. If they do not, you can not be attacked except by creatures with flying until end of turn.	Mace of Ideas U Artifact – Equipment Equip Equipped creature gets +1/+1 for each land type among all lands you control. Ideas, like weapons, can only realize their true potential when they are shared.	Goat Sigil Bearer U Creature – Goat Flash, first strike Goat Sigil Bearer gets +1/+1 for each other creature you control. At the beginning of your opponent's end step, if Goat Sigil Bearer entered the battlefield this turn, sacrifice it. If you do, draw a card. 3/1	Volrath's Whim U Sorcery When you cast Volrath's Whim, any player may pay 5 life. If a player does, counter Volrath's Whim. Target player puts a card from their hand on top of their library. Then, look at the top four cards of that player's library and exile three of them.	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
Anti-Aura Acolyte C Creature – Elemental Shaman Protection from enchantments , Discard Anti-Aura Acolyte: Target creature gains protection from enchantments until end of turn. 2/2	Holy Favor C Enchantment – Aura Enchant Creature Enchanted creature gets +2/+1. At end of turn, return Holy Favor to its owner's hand.	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	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.	Curious Drake C Creature – Drake Flying Whenever Curious Drake deals damage to an opponent, you may draw a card. No bird soars too far, if he soars to find his desire. 2/2
Unloved Devil C Creature – Devil Mercenary Flying It's hard to call it flying, the way they seem to fall out of the sky, collapsing on their prey. 1/1	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.	Unholy Pact C Enchantment – Aura Enchant Creature Enchanted creature gets +2/+1. When enchanted creature dies, return that card to the battlefield under your control. "You know how it is. Everyday it's 'trade my soul this', and 'give me more power that'. Of course I don't have more time to visit, Mum."	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.	Plains B Basic Land – Plains

Arena Walls (rare)
Mace of Ideas (uncommon)
Goat Sigil Bearer (uncommon)
Volrath's Whim (uncommon)
Monsivore Rex (common)
Anti-Aura Acolyte (common)
Holy Favor (common)
Plume Serpent (common)
Prismatic Surge (common)
Curious Drake (common)
Unloved Devil (common)
Explosive Shoots (common)
Unholy Pact (common)
Book Slide (common)
Plains (basic)