Yet another card dump (Circeus's): Virtual Booster

Defiled Forest #2    R  Land Defiled Forest #2 enters the battlefield tapped unless you return a land you control to its owner's hand. : Add or to your mana pool.	Netcaster Blightwidow    U  Creature – Spider Reach Netcaster Blightwidow can block an additional creature if that creature has flying. 2/4	Esper Lore    U  Instant Return target creature to its owner's hand. If was spent to cast Esper Lore, you may return target enchantment card in your graveyard to your hand. If was spent to cast Esper Lore, exile all cards in target player's graveyard.	Mass Untap    U  Instant Untap all creatures you control. Draw a card.	Library Familiars    C  Creature – Rat Flying Whenever a spell is countered, put a +1/+1 counter on Library Familiars. For centuries magic was rare and revered. When sciencists figured out it was just another natural force to be manipulated, mages suddenly found themselves helpless against them. 1/1
Amphisbene    C  Creature – Lizard Deathtouch 2/2	Slice Bones    C  Sorcery Destroy target nonblack creature. Bolster 1 (Choose a creature with the least toughness among creatures you control and put 1 +1/+1 counter on it).	Fumes Fatale    C  Sorcery Target creature gets -2/-4 until end of turn.	Dwarven Gas Knocker    C  Creature – Dwarf Artificer Whenever a player casts a red spell, Dwarven Gas Knocker gets +1/+0 until end of turn. 1/1	Firegrove Elemental    C  Creature – Elemental : Firegrove Elemental gains menace until end of turn. 3/3
Prepared Warrior    C  Creature – Kor Soldier Engage (As an opponent's combat phase begins, you may have this creature block this turn if able.) Whenever Prepared Warrior blocks a creature, if it's engaged, it gain first strike until end of turn. 2/2	Demented Flautist    C  Creature – Goblin Shaman , Sacrifice Demented Flautist: Counter target spell that targets one or more creatures you control. He knows cadences that will wrench your ideas from you, and pitches that will throw you into madness. 2/2	Sudden Recall    C  Instant Return target instant or sorcery card from your graveyard to your hand, then discard a card. Escalate (Then any opponent may pay this spell's escalate cost and copy it. They may choose new targets for the copy.)	Spider's Leap    C  Instanr Untap target creature. It gains reach and deathtouch until end of turn. Escalate (Then any opponent may pay this spell's escalate cost and copy it. They may choose new targets for the copy.)	Island    B  Basic Land – Island

Defiled Forest #2 (rare)
Netcaster Blightwidow (uncommon)
Esper Lore (uncommon)
Mass Untap (uncommon)
Library Familiars (common)
Amphisbene (common)
Slice Bones (common)
Fumes Fatale (common)
Dwarven Gas Knocker (common)
Firegrove Elemental (common)
Prepared Warrior (common)
Demented Flautist (common)
Sudden Recall (common)
Spider's Leap (common)
Island (basic)