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.

Icy Proctor R Creature – Crab Cleric Adrift (At the beginning of your upkeep, simultaneously exile all adrift creatures you control on the battlefield, and return all exiled adrift creatures you own to the battlefield. They gain haste.) All other blue creatures you control gain +1/+1. When Icy Proctor enters the battlefield, put two 1/1 blue crab tokens into play. 3/3	Archimedian Screw Pump U Artifact , : Tap up to one target creature, gain 2 life, and put the top three cards of target player's library into that player's graveyard.	Graveburst U Sorcery Return a creature from your graveyard to the battlefield, then tap it unless you control a Mountain. That creature gains haste until end of turn, and is a black Zombie in addition to its other types.	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	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.
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.	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	Mishra's Rite C Instant Tap two target lands, then add to your mana pool. Draw a card.	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".	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
Evangelizing Aven C Creature – Bird Soldier Flying As long as Evangelizing Aven is tapped, it gets +2/-2. "They keep screaching 'Repent! Repent! Repent!'. What will it take to stop their infernal squaking?" - Halina, Dwarven Trader 2/4	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	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."	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	Swamp B Basic Land – Swamp

Icy Proctor (rare)
Archimedian Screw Pump (uncommon)
Graveburst (uncommon)
Goat Sigil Bearer (uncommon)
Steadfast Assault (common)
Harmonic Vale (common)
Friend Ward (common)
Mishra's Rite (common)
Snowball Fight (common)
Corona of Power (common)
Evangelizing Aven (common)
Unloved Devil (common)
Unholy Pact (common)
Plume Serpent (common)
Swamp (basic)