Unstable

Lobe Lobber

Lobe Lobber {2}

Artifact - Equipment
Equipped creature has "{T}: This creature deals 1 damage to target player or planeswalker. Roll a six-sided die. On a 5 or higher, untap it."
Equip {2}
"Time for you to meet the brains of this operation!"
—The Big Idea
Mad Science Fair Project

Mad Science Fair Project {3}

Artifact
{T}: Roll a six-sided die. On a 3 or lower, target player adds {C}. Otherwise, that player adds one mana of any color they choose.
"When it comes down to it, science is more art than science."
Modular Monstrosity

Modular Monstrosity {7}

Artifact Creature - Construct
Whenever an opponent casts a spell, you have five seconds to choose a keyword you haven't chosen for a card named Modular Monstrosity today that's been printed on a creature card. If you do, Modular Monstrosity gains that ability. Otherwise, Modular Monstrosity loses all keyword abilities.
3/3
Proper Laboratory Attire

Proper Laboratory Attire {1}

Artifact - Equipment
Equipped creature gets +2/+1 and has protection from die rolls. (Nothing that lets a player roll a die can block, target, deal damage to, or attach to equipped creature.)
Equip {2}
Robo-

Robo-

Artifact Creature - Construct
At the beginning of each end step, if an artifact entered the battlefield under your control this turn,
Augment {2} ({2}, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)
+1/+1
Split Screen

Split Screen {4}

Artifact
When Split Screen enters the battlefield, shuffle your library and deal it into four libraries. If anything refers to your library, choose one of your libraries for it.
Play with your libraries' top cards revealed.
When Split Screen leaves the battlefield, shuffle your libraries together.
Staff of the Letter Magus

Staff of the Letter Magus {3}

Artifact
As Staff of the Letter Magus enters the battlefield, choose a consonant other than N, R, S, or T.
Whenever a player casts a spell, you gain 1 life for each time the chosen letter appears in that spell's name.
A symbol of _________ in _________ times.
Stamp of Approval

Stamp of Approval {3}

Artifact
As Stamp of Approval enters the battlefield, choose a watermark.
Creatures you control with the chosen watermark get +1/+1.
A truly symbolic advantage.
Steam-Powered

Steam-Powered

Artifact Creature - Construct
{5}:
Augment {4} ({4}, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)
+0/+4
Steel Squirrel

Steel Squirrel {2}

Artifact Creature - Squirrel
Whenever you roll a 5 or higher on a die, Steel Squirrel gets +X/+X until end of turn, where X is the result.
{6}: Roll a six-sided die.
Q: Where does a mechanical squirrel hide its nuts?
A: In a bolt hole.
1/1
Sword of Dungeons & Dragons

Sword of Dungeons & Dragons {3}

Artifact - Equipment
Equipped creature gets +2/+2 and has protection from Rogues and from Clerics.
Whenever equipped creature deals combat damage to a player, create a 4/4 gold Dragon creature token with flying and roll a d20 (a twenty-sided die). If you roll a 20, repeat this process.
Equip {2}
Voracious Vacuum

Voracious Vacuum {3}

Host Artifact Creature - Construct
When this creature enters the battlefield, put a +1/+1 counter on target creature.
1/1
Secret Base

Secret Base

Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.
The Order of the Widget doesn't believe in traveling light.
Secret Base

Secret Base

Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.
The location of S.N.E.A.K. HQ is a closely guarded secret.
Secret Base

Secret Base

Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.
The League of Dastardly Doom takes the word "headquarters" very seriously.
Secret Base

Secret Base

Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.
For the Goblin Explosioneers, there's no crater like home.
Secret Base

Secret Base

Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.
"WARNING: Do not feed the rhinopus."
—Crossbreed Labs campus advisory
Watermarket

Watermarket

Land
{T}: Add {C}{C}. Spend this mana only to cast spells with watermarks.
Shopping List
Lamp-hand attachment
X-ray contact lenses
Discount death ray
Two-headed hammer
Kitten-fish
Accessories to Murder

Accessories to Murder

Artifact - Contraption
Whenever you crank Accessories to Murder, target creature gets +X/+0 until end of turn, where X is the number of creatures you control.
Applied Aeronautics

Applied Aeronautics

Artifact - Contraption
Whenever you crank Applied Aeronautics, until end of turn, target creature gets +1/+0, gains flying, and becomes an artifact in addition to its other types.
Arms Depot

Arms Depot

Artifact - Contraption
Whenever you crank Arms Depot, put two +1/+1 counters on target creature.
Auto-Key

Auto-Key

Artifact - Contraption
Whenever you crank Auto-Key, until end of turn, target creature becomes an artifact in addition to its other types and gains "{T}: You gain 3 life."
Bee-Bee Gun

Bee-Bee Gun

Artifact - Contraption
Whenever you crank Bee-Bee Gun, until end of turn, target creature gains "{2}: This creature fights another target creature."
Boomflinger

Boomflinger

Artifact - Contraption
Whenever you crank Boomflinger, roll two six-sided dice. Boomflinger deals damage to target player or planeswalker equal to the difference between those results.
Buzz Buggy

Buzz Buggy

Artifact - Contraption
Whenever you crank Buzz Buggy, target creature gets +2/+0 and gains trample until end of turn.