Mechanics Playground: 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.
Spinal Fluid Swapper
{5}
 
 R 
Artifact
{5}, {t}: Two target players exchange life totals.
Adrenaline Rush
{2}{g}
 
 U 
Sorcery
Until end of turn, whenever a creature you control deals combat damage to a player, draw a card.
Tunneling Hydra
{x}{g}
 
 U 
Creature – Hydra
Tunneling Hydra enters the battlefield with X +1/+1 counters on it.
Skulk
Lie Detector
{2}{w}{w}
 
 U 
Creature – Human Wizard
When Lie Detector enters the battlefield, Interrogate an opponent. (That player reveals a hidden card in his or her hand until it leaves their hand. It can't be played on their next turn.)
Revealed non-land cards in your opponents' hands cost {2} more to cast.
2/3
Flayed Infiltrator
{b}
 
 C 
Creature – Golem
Bloodcast 2 (As an additional cost to cast this, you may pay up to {2}. This enters the battlefield with that many +1/+1 counters on it and you lose that much life.)
Skulk
1/1
Enormous Growth
{g}
 
 C 
Sorcery
Target creature gets +3/+4 until end of turn.
Squirrel Infestation
{2}{g}
 
 C 
Enchantment – Aura
Enchant land you don't control
Whenever enchanted land becomes untapped, put a 1/1 green Squirrel creature token onto the battlefield.
Lacuna Vanguard
{2}
 
 C 
Creature – Eldrazi Drone
Lacuna Vanguard enters the battlefield with a +1/+1 counter on it for each {c} spent to cast it.
1/1
Mana Seal
{u}{u}
 
 C 
Enchantment
When a player casts a spell, counter that spell and sacrifice Mana Seal.
Jerry-Rig
{1}{r}
 
 C 
Instant
Gain control of target artifact. Sacrifice it at the beginning of the next end step.
Screambond
{1}{b}
 
 C 
Instant
Until end of turn, whenever target creature is dealt damage, you gain that much life.
Draw a card.
Automata Surgeon
{3}{u}
 
 C 
Creature – Human Artificer
{u}, {t}: Assemble 1 (Put 1 colorless Contraption artifact token/s onto the battlefield.)
Sacrifice a Contraption: Untap Automata Surgeon.
2/4
Psychic Boy
{u}
 
 C 
Creature – Human Townsfolk
Whenever Psychic Boy blocks, draw a card.
1/1
Aether Blueprints
{2}
 
 C 
Artifact
{t}, Reveal a card in your hand. Add one of that card's colors to your mana pool.
Island
 
 B 
Basic Land – Island

Spinal Fluid Swapper (rare)
Adrenaline Rush (uncommon)
Tunneling Hydra (uncommon)
Lie Detector (uncommon)
Flayed Infiltrator (common)
Enormous Growth (common)
Squirrel Infestation (common)
Lacuna Vanguard (common)
Mana Seal (common)
Jerry-Rig (common)
Screambond (common)
Automata Surgeon (common)
Psychic Boy (common)
Aether Blueprints (common)
Island (basic)