Yomama's custom cards: Virtual Booster

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This booster was generated with pre-Magic 2010 collation since the cardset contains no mythics: 1 rare, 3 uncommons, 11 commons.
You could alternatively have 15 random cards regardless of rarity.
 R 
Legendary Creature – Spirit
You may exert Disturber of the Rock Garden. When you do, cast target Spirit or Arcane spell from your hand, and pay {x} instead of its mana cost, where X is its converted mana cost minus one.
Whenever you draw a card, untap Disturber of the Rock Garden.
3/4
 U 
Creature – Zombie Elf
At the beginning of your precombat main phase, add 1 mana of any color to your mana pool and lose 1 life.
1/2
 U 
Creature – Snake
When Boa Destructor enters the battlefield, choose target creature.
Cumulative upkeep – Deal 1 damage to the chosen creature.) (At the beginning of your upkeep, if this permanent is on the battlefield, put an age counter on this permanent. Then you may deal 1 damage to the chosen creature for each age counter on it. If you don’t, sacrifice it.)
2/2
 U 
Creature – Spirit
Graft 1 (This creature enters the battlefield with one +1/+1 counters on it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.)
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
0/0
 C 
Creature – Eldrazi Zubera Spirit
When Fractal-Egg Zubera dies, create a 1/1 colorless Eldrazi Scion token with "Sacrifice this creature: Add {c} to your mana pool." for each Zubera that died this turn.
1/2
 
 
No more commons
 
 
No more commons
 C 
Creature – Human Soldier
When Aura Thrower enters the battlefield, attach target Aura you control to target creature.
"You're under Arrest!"
1/2
 
 
No more commons
 C 
Enchantment – Aura
Enchant creature
Totem armor (If enchanted permanent would be destroyed, instead remove all damage marked on it and destroy this Aura.)
 C 
Creature – Turtle Warrior
You may exert Shell Smasher as it attacks. When you do, target creature loses defender and gains +4/-2 until end of turn. (An exerted creature won't untap during your next untap step.)
"The best defense is a good offense."
3/4
 C 
Enchantment
Whenever a land you control is destroyed, add one mana of any color to your mana pool.
 C 
Creature – Elemental
Morph {r} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
4/1
 
 
No more commons
 C 
Creature – Squirrel Knight
First strike
"I just wanna bust a nut"
3/2

Disturber of the Rock Garden (rare)
Woodrot Farmer (uncommon)
Boa Destructor (uncommon)
Unceasing Martyr (uncommon)
Fractal-Egg Zubera (common)
Aura Thrower (common)
Simple Totem (common)
Shell Smasher (common)
Ruin Bloom (common)
Lava Bombie (common)
Squirrel Cavalier (common)