Null Group Biological Assets

During your turn, this creature has first strike.
Whenever this creature attacks, you may discard a card. If you do, draw a card.

Storm of Steel

Storm of Steel deals 2 damage to each of one or two targets.

Turtle Lair

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a Ninja or Turtle spell.
{3}, {T}: Target Ninja or Turtle can't be blocked this turn.

Utrom Scientists

When this creature enters, tap up to one target creature and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Henchbots

When this creature enters, exile target tapped creature an opponent controls until this creature leaves the battlefield.

Manhole Cover

Flash (You may cast this spell any time you could cast an instant.)
When this artifact enters, target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
{2}, Sacrifice this artifact: Target player draws a card.

Purple Dragon Punks

{T}: Add {R}. Spend this mana only to cast an artifact spell or to activate an ability.

Omni-Cheese Pizza

When this artifact enters, draw a card.
{1}, {T}, Sacrifice this artifact: Add one mana of any color.
{2}, {T}, Sacrifice this artifact: You gain 3 life.

General Traag, Heart of Stone

Trample
When General Traag enters, you may sacrifice another artifact. When you do, General Traag deals 4 damage to target creature.

Donatello, Mutant Mechanic

{T}: Put three +1/+1 counters on target artifact you control. If it isn't a creature, it becomes a 0/0 Robot creature in addition to its other types. Activate only as a sorcery.
Whenever an artifact you control is put into a graveyard from the battlefield, if it had counters on it, put those counters on up to one target artifact or creature you control.

Mouser Attack!

Choose one —
• Create a 1/1 colorless Robot artifact creature token.
• Target creature gets +3/+0 and gains first strike until end of turn.

Hard-Won Jitte

Equipped creature has double strike.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Donatello's Technique

Sneak {U} (You may cast this spell for {U} if you also return an unblocked attacker you control to hand during the declare blockers step.)
Draw two cards.

Zog, Triceraton Castaway

Reach, trample
When Zog enters, target creature can't block this turn.
Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Monster Mashup

Reach (This creature can block creatures with flying.)
Menace (This creature can't be blocked except by two or more creatures.)

Ooze Spill

Counter target spell. Create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")

Island

April, Reporter of the Weird

Whenever April deals combat damage to a player, draw that many cards, then discard a card.

Raphael's Technique

Sneak {2}{R} (You may cast this spell for {2}{R} if you also return an unblocked attacker you control to hand during the declare blockers step.)
Each player may discard their hand and draw seven cards.

Retro-Mutation

Flash
Enchant creature
Enchanted creature is a Turtle with base power and toughness 0/1. It can't attack and loses all abilities. (It also loses all other creature types.)

Bespoke Bō

When this Equipment enters, return up to one other target nonland permanent to its owner's hand.
Equipped creature gets +2/+1 and has vigilance.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Marauding Sphinx

Flying, vigilance, ward {2}
Whenever you commit a crime, surveil 2. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Baxter Stockman

When Baxter Stockman enters, create a 1/1 colorless Robot artifact creature token.
At the beginning of combat on your turn, target artifact creature you control gets +3/+0 and gains first strike and vigilance until end of turn.

Salivating Gremlins

Whenever an artifact you control enters, this creature gets +2/+0 and gains trample until end of turn.

Skateboard

When this Equipment enters, tap target permanent.
Equipped creature gets +1/+0 and has haste.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Jennika's Technique

Sneak {R} (You may cast this spell for {R} if you also return an unblocked attacker you control to hand during the declare blockers step.)
Jennika's Technique deals 2 damage to each creature.

Containment Protocol

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Buzz Bots

Flying, vigilance
When this creature dies, draw a card.

Mind Transfer Protocol

Until end of turn, target artifact or creature becomes an artifact creature with base power and toughness 4/5.
Draw a card.

April O'Neil, Human Element

Whenever a player casts an artifact, instant, or sorcery spell, you create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")

TCRI Building

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {U} or {R}.

Metalhead

When Metalhead enters, return up to one other target artifact or creature to its owner's hand.
{R}, Sacrifice another artifact: Put a +1/+1 counter on Metalhead. He gains menace and haste until end of turn.

Brilliance Unleashed

Choose one or both —
• Brilliance Unleashed deals 5 damage to target creature.
• Choose target artifact card in your graveyard. Return it to the battlefield if it's an artifact creature card. Otherwise, return it to the battlefield and it's a 3/3 Robot artifact creature with flying.

Utrom Monitor

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying (This creature can't be blocked except by creatures with flying or reach.)

Sewer-veillance Cam

Flash
When this artifact enters or leaves the battlefield, you may tap or untap target creature.
{3}{U}, Sacrifice this artifact: Draw two cards.

Donatello's Science Lesson

Tap up to two target creatures. Up to two target players each draw a card.

Mouser Mark III

This creature can't attack unless you control another artifact.

Crookclaw Transmuter

Flash
Flying
When this creature enters, switch target creature's power and toughness until end of turn.

Wingnut, Bat on the Belfry

Alliance — Whenever another creature you control enters, Wingnut gains your choice of flying, menace, or haste until end of turn.
Whenever Wingnut attacks, each other attacking creature gets +1/+0 until end of turn.

Manhole Missile

Manhole Missile deals 3 damage to target creature. You may put a card from your hand on the bottom of your library. If you do, draw a card.

Donatello, Way with Machines

Flying
Whenever an artifact you control enters, put a +1/+1 counter on Donatello.

Nanoform Sentinel

Whenever this creature becomes tapped, untap another target permanent. This ability triggers only once each turn.

Raph's Bravado

During your turn, attacking creatures get +1/+0.

Escape Tunnel

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{T}, Sacrifice this land: Target creature with power 2 or less can't be blocked this turn.

Negate

Ravenous Robots

Whenever you cast an artifact spell, create a 1/1 colorless Robot artifact creature token.
{R}, {T}: Creature tokens you control gain haste until end of turn.

Raphael, Most Attitude

Menace (This creature can't be blocked except by two or more creatures.)
Alliance — Whenever another creature you control enters, you may exile the top card of your library.
Whenever Raphael attacks, until end of turn, you may play a card exiled with Raphael.

Fugitive Droid

This creature can't be blocked if an artifact entered the battlefield under your control this turn.
{U}, Sacrifice this creature: Counter target spell that targets an artifact or creature you control.

Swiftwater Cliffs

Mountain

Broadcast Takeover

Gain control of all artifacts your opponents control until end of turn. Untap them. They gain haste until end of turn.

Spicy Oatmeal Pizza

When this artifact enters, it deals 4 damage to any target and 3 damage to you.
{2}, {T}, Sacrifice this artifact: You gain 3 life.

Donatello, Turtle Techie

When Donatello enters, if you control an artifact, draw a card.

Raphael, Tag Team Tough

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Raphael deals combat damage to a player for the first time each turn, untap all attacking creatures. After this combat phase, there is an additional combat phase.

Mouser Foundry

When this artifact enters or leaves the battlefield, create a 1/1 colorless Robot artifact creature token.
{4}{R}, Sacrifice this artifact: It deals 3 damage to target creature.

Donnie & April, Adorkable Duo

When Donnie & April enter, choose one or both. Each mode must target a different player.
• Target player draws two cards.
• Target player returns an artifact, instant, or sorcery card from their graveyard to their hand.

Bot Bashing Time

Bot Bashing Time deals 6 damage to target creature. If that creature would die this turn, exile it instead.

Does Machines

(Gain the next level as a sorcery to add its ability.)
When this Class enters, mill two cards, draw two cards, then discard two cards.
{1}{U}: Level 2
When this Class becomes level 2, return up to two target artifact cards from your graveyard to your hand.
{4}{U}: Level 3
At the beginning of combat on your turn, put three +1/+1 counters on target artifact you control. If it isn't a creature, it becomes a 0/0 Robot creature in addition to its other types.

Improvised Arsenal

Equipped creature gets +1/+0 for each artifact you control.
{4}{R}: Create a token that's a copy of this Equipment.
Equip {R}

Nobody

When this creature enters, return up to one other target artifact you control to its owner's hand. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Return to the Sewers

Target creature's owner puts it on their choice of the top or bottom of their library. You create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")

Casey Jones, Jury-Rig Justiciar

Haste
When Casey Jones enters, look at the top four cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Battlesong Berserker

Whenever you attack, target creature you control gets +1/+0 and gains menace until end of turn. (It can't be blocked except by two or more creatures.)

Chrome Dome

Other artifact creatures you control get +1/+0.
{5}: Create a token that's a copy of another target artifact you control. That token gains haste. Sacrifice it at the beginning of the next end step.

Rock Soldiers

When this creature enters, destroy up to one target noncreature artifact.

Don & Raph, Hard Science

Menace
Whenever Don & Raph attack, the next noncreature spell you cast this turn has affinity for artifacts. (It costs {1} less to cast for each artifact you control.)

Ray Fillet, Man Ray

Flying
When Ray Fillet enters, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")
{2}, Remove a +1/+1 counter from a creature you control: Draw a card.

Raphael, Tough Turtle

Alliance — Whenever another creature you control enters, Raphael deals 1 damage to target opponent.

Turtle Blimp

Flying
When this Vehicle enters, create a 2/2 red Mutant creature token.
Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)