Menace

Modular 2 (This creature enters the battlefield with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Whenever you cast a spell other than your first spell each turn, put a +1/+1 counter on Arcbound Tracker.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

At the beginning of each end step, if you created a token this turn, draw a card.

Return target creature to its owner's hand. If it was tapped, create a Map token. (It's an artifact with ", , Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.")

When Brackwater Elemental attacks or blocks, sacrifice it at the beginning of the next end step.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

, : Look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flying

When Cold Case Cracker dies, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Vanishing 3 (This enchantment enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

When Crack in Time enters the battlefield and at the beginning of your precombat main phase, exile target creature an opponent controls until Crack in Time leaves the battlefield.

Each player sacrifices a permanent.

Whenever you activate an ability of an artifact or creature that isn't a mana ability, Crackdown Construct gets +1/+1 until end of turn.

, , Tap two untapped red creatures you control: Crackleburr deals 3 damage to any target.

, , Untap two tapped blue creatures you control: Return target creature to its owner's hand. ( is the untap symbol.)

Crackling Doom deals 2 damage to each opponent. Each opponent sacrifices a creature with the greatest power among creatures that player controls.

Enchant land you control

Enchanted land is a 3/3 red Spirit creature with haste. It's still a land.

If enchanted land would be destroyed, instead sacrifice Crackling Emergence and that land gains indestructible until end of turn.

Flash

When Crackling Spellslinger enters the battlefield, if you cast it, the next instant or sorcery spell you cast this turn has storm. (When you cast that spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

As Cursed Rack enters the battlefield, choose an opponent.

The chosen player's maximum hand size is four.

, : If Durkwood Tracker is on the battlefield, it deals damage equal to its power to target attacking creature. That creature deals damage equal to its power to Durkwood Tracker.

Whenever Goblin Racketeer attacks, you may goad target creature defending player controls. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Flying

When Griffnaut Tracker enters the battlefield, exile up to two target cards from a single graveyard.

Reach

When Kraul Whipcracker enters the battlefield, destroy target token an opponent controls.

Flying, trample

When Mindwrack Demon enters the battlefield, mill four cards.

Delirium — At the beginning of your upkeep, you lose 4 life unless there are four or more card types among cards in your graveyard.

Other blue creatures you control get +1/+1.

Other red creatures you control get +1/+1.

: You may put a blue or red creature card from your hand onto the battlefield.

Whenever Orzhov Racketeers deals combat damage to a player, that player discards a card.

Afterlife 2 (When this creature dies, create two 1/1 white and black Spirit creature tokens with flying.)

: Untap target land.

: Choose target battle. If an opponent protects it, remove a defense counter from it. Otherwise, put a defense counter on it. Activate only as a sorcery.

Whenever Pulse Tracker attacks, each opponent loses 1 life.

When Racketeer Boss enters the battlefield, choose up to two creature and/or planeswalker cards in your hand. They perpetually gain "When you cast this spell, create a Treasure token."

Haste

Whenever Ruby, Daring Tracker attacks while you control a creature with power 4 or greater, Ruby gets +2/+2 until end of turn.

: Add or .

Players can't gain life this turn. Damage can't be prevented this turn. Skullcrack deals 3 damage to target player or planeswalker.

As The Rack enters the battlefield, choose an opponent.

At the beginning of the chosen player's upkeep, The Rack deals X damage to that player, where X is 3 minus the number of cards in their hand.

Landfall — Whenever a land enters the battlefield under your control, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Clue, put a +1/+1 counter on Tireless Tracker.

Scry 3, then reveal the top card of your library. If it's a creature or land card, draw a card. (To scry 3, look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Reveal the top four cards of your library. Put a creature card from among them into your hand and the rest into your graveyard.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

, : Target creature you control fights another target creature.

, : Venomspout Brackus deals 5 damage to target attacking or blocking creature with flying.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Weapon Rack enters the battlefield with three +1/+1 counters on it.

: Move a +1/+1 counter from Weapon Rack onto target creature. Activate only as a sorcery.

Target creature deals damage to itself equal to its power.