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.

Armored Balefire R Creature – Spirit Horror Flying When Armored Balefire enters the battlefield, Armored Balefire deals 3 damage to target creature and you gain 3 life. Armored Balefire gets +2/+2 for each Plains and Mountain pair that you control. 0/0	Bargain Eiedelon U Creature – Spirit , Sacrifice Bargain Eiedelon: Lose X life and draw X cards. Whenever you cast a multicolored spell, you may return Bargain Eiedelon from your graveyard to your hand. 3/3	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.	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	Snowball Fight C Instant Until end of turn, blocking creatures neither deal, nor receive combat damage, and gain ": Deal 1 damage to target attacking creature".
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.	Wicked Witch Engine C Artifact Creature – Elemental Horror : Target player dealt damage by Wicked Witch Engine this turn loses 1 life. 2/2	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	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.	Friend Ward C Enchantment – Aura Enchant creature Enchanted creature gains protection from its colors. This effect does not remove Friend Ward. "When you wield authority, there is no greater threat to yourself, than yourself." -The Lord of Atlantis
Rat Nest Ogre C Creature – Ogre Discard a card at random from your hand: Rat Nest Ogre can't block this turn. Any player may play this ability. "Been living with the rats too long. Can no longer see. Rats don't mind, though. Just give me their eyes." 4/1	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.	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.	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	Island B Basic Land – Island

Armored Balefire (rare)
Bargain Eiedelon (uncommon)
Niven's Battlestone (uncommon)
Goat Sigil Bearer (uncommon)
Snowball Fight (common)
Book Slide (common)
Wicked Witch Engine (common)
Monsivore Rex (common)
Explosive Shoots (common)
Friend Ward (common)
Rat Nest Ogre (common)
Blessing Unbent (common)
Harmonic Vale (common)
Shade of Prey (common)
Island (basic)