Kalcebo: 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.
You could alternatively have 15 random cards regardless of rarity.
 R 
Legendary Creature – Demon
Murdren, Harbinger of Corruption’s power and toughness are equal to the number of Swamps you control.
Other creatures you control are black and get +1/+1 for each Swamp you control beyond the fifth.
“My army grows stronger with each passing moment. Holy masters of the light, prepare to meet your end.”
*/*
 U 
Sorcery
Until end of turn, if you tap a permanent for mana, it produces twice as much of that mana instead.
 U 
Creature – Spider
Threshold – As long as seven or more cards are in your graveyard. Sluggish Recluse gets +1/+1 and has “{t}: Destroy target creature with flying. Sluggish Recluse doesn’t untap during your next untap step.”
3/5
 U 
Sorcery
You draw two cards and target opponent discards two cards.
 C 
Creature – Human Wizard
{u}{u}, sacrifice Myga’s Apprentice: Draw two cards, then discard a card.
2/4
{r}
 
 C 
Sorcery
Punish deals 2 damage to target creature and 2 damage to that creature’s controller.
 C 
Creature – Human Cleric
Whenever a player discards a card, you may gain 1 life.
"There will be gains for our losses. There will be rights for our wrongs."
1/1
 C 
Creature – Squirrel
When Treetop Beastcaller enters the battlefield, look at the top three cards of your library. You may reveal a creature card from among them and put that card into your hand. Put the rest on the bottom of your library in any order.
1/1
 C 
Creature – Illusion
Defender, flying
When Runehowler becomes the target of a spell or ability, sacrifice it.
Produced solely to protect the laboratories from curious outsiders, Runehowlers are more of a sentient alarm system rather than a means of intimidation.
3/3
 C 
Creature – Human Soldier
First strike, haste
2/1
 C 
Sorcery
You draw three cards and lose 3 life.
Madness {1}{b}{b} (If you discard this card, you may cast it for its madness cost instead of putting it into your graveyard.)
 C 
Instant
Until end of turn, creatures you control get +1/+0 and gain “When this creature dies, you may have it deal 1 damage to target player.”
 C 
Instant
Up to two target creatures get +1/+1 and gain flying until end of turn.
 C 
Artifact Creature – Gnome
Disinter (Discard two cards: Return this card from your graveyard to your hand)
1/1
Mountain
 
 B 
Basic Land – Mountain

Murdren, Harbinger of Corruption (rare)
Taste of Prosperity (uncommon)
Sluggish Recluse (uncommon)
Mindculling (uncommon)
Myga’s Apprentice (common)
Punish (common)
Confessor (common)
Treetop Beastcaller (common)
Runehowler (common)
Alpha Renegade (common)
Contract from the Underworld (common)
Chaotic Rebuttal (common)
Gift from the Heavens (common)
Warlock’s Helpers (common)
Mountain (basic)