Logic: the Processing: Virtual Booster

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This booster was generated with modern collation since the cardset contains mythics: 1 rare / mythic, 3 uncommons, 10 commons, 1 basic land, 1 token.
You could alternatively have 15 random cards regardless of rarity.
Dual classes
 
 C 
Creature
List of flavorful names for dual classed creatures. Based on community set ideas for tribal. You may use them in your own set if you need inspiration.
 
Nonexist
{1}{?}{?}{b}
 
 R 
Instant
({?} can be paid with {1} or by exiling the top two cards of your library.)

Exile target creature or creature card in a graveyard.
Sword
{w}
 
 U 
Instant
Target creature gets +1/+0 and first strike until end of turn.

Somersault (If this card is put into the graveyard from anywhere, transform it.)
Offense
{w}
 
 U 
Instant
Counter target spell that targets a creature you control.
Ethereal Corpse
{1}{u}{b}
 
 U 
Creature – Zombie Illusion
Resilience (Prevent all damage dealt to this permanent, and its toughness can't be reduced.)

When Ethereal Corpse is destroyed or exiled, draw a card.
2/1
Site
 
 U 
Land – Site
{t}: Generate {c}.

Reform {5}{w}{w}{w} (You may cast the back face of this card by paying its reform cost.)
Sororize
 
 U 
Colour indicator W Enchantment
At the beginning of your upkeep, create a 3/3 white Angel creature token with flying.
Gobbly Goblin
{2}{r}
 
 C 
Creature – Goblin Berserker
First strike
< {2} Combine right
3/1
Naught
{1}{u}
 
 C 
Instant
Target creature's base power is 0 until end of turn.

Reform {2}{g} (You may cast the back face of this card by paying its reform cost.)
Sail
 
 C 
Sorcery
Search your library for a basic land card and put it onto the battlefield tapped. Then shuffle your library.
Petrified Forest
{2}{g}{g}
 
 C 
Land – Terrain
{t}: Add {g} to your mana pool.

Creatures occupying Petrified Forest have deathtouch.
4/8
Mustang Convertible
{1}{r}
 
 C 
Creature – Horse
Haste (This comes under your control unlagged.)
2/1
Dual classes
 
 C 
Creature
List of flavorful names for dual classed creatures. Based on community set ideas for tribal. You may use them in your own set if you need inspiration.
Traits
 
 C 
Characteristic – Trait
Traits are a subset of characteristics. Currently, these include power and toughness. A new trait called skill could be appended.
Dark Cave
 
 C 
Basic Land – Plot
Dark Cave enters the battlefield tapped.

{t}: Add {w} or {b} to your mana pool.
Formal Drake
{2}{u}{u}
 
 C 
Creature – Drake
Flying

Reform {2}{u} (You may cast the back face of this card by paying its reform cost.)
2/2
Drake Attire
 
 C 
Enchantment – Aura
Enchant creature

Enchanted creature gets +2/+2 and has flying.
Jace's Counterplay
{1}{u}{u}
 
 C 
Tagged Instant – Jace
Jace's Counterplay costs {1} less to cast if you control Jace.

Counter target spell.

I knew what you're trying to do before you even thought of it.--Jace
New name for instant
 
 B 
Fastcast
Suggest new names for the Instant card type.
Betting on a duel
 T 
Mechanic – Betting Duel
Bet on a duel

See comment thread for details.

Dual classes (common, foil)
Nonexist (rare)
Sword // Offense (uncommon)
Ethereal Corpse (uncommon)
Site (uncommon)
Gobbly Goblin (common)
Naught (common)
Petrified Forest (common)
Mustang Convertible (common)
Dual classes (common)
Traits (common)
Dark Cave (common)
Formal Drake (common)
Jace's Counterplay (common)
New name for instant (basic)
Betting on a duel (token)