Defender

: Put target card from a graveyard on the bottom of its owner's library.

Creatures with power 1 or less don't untap during their controllers' untap steps.

Living weapon

Indestructible

Equipped creature gets +5/+5 and has first strike, trample, indestructible, haste, and "Whenever this creature deals combat damage to a creature, exile that creature."

Equip

When Kaleidostone enters, draw a card.

, , Sacrifice Kaleidostone: Add .

Karn, Legacy Reforged's power and toughness are each equal to the greatest mana value among artifacts you control.

At the beginning of your upkeep, add for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.

Karn's Sylex enters tapped.

Players can't pay life to cast spells or to activate abilities that aren't mana abilities.

, , Exile Karn's Sylex: Destroy each nonland permanent with mana value X or less. Activate only as a sorcery.

, : Target player mills X cards, where X is the number of cards in that player's graveyard.

Blue creature spells you cast cost less to cast.

Whenever you cast a creature spell, target creature an opponent controls doesn't untap during its controller's next untap step.

For Mirrodin (When this Equipment enters, create a 2/2 red Rebel creature token, then attach this to it.)

Equipped creature gets +1/+1 for each creature you control.

Equip

Key to the Archive enters the battlefield tapped.

When Key to the Archive enters the battlefield, draft a card from Key to the Archive's spellbook, then discard a card.

: Add two mana in any combination of colors.

, , Sacrifice Keys to the House: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

, , Sacrifice Keys to the House: Lock or unlock a door of target Room you control. Activate only as a sorcery.

Visit — Creatures you control get +1/+0 until end of turn.

Lights — 2, 3, 6

Visit — Creatures you control get +1/+0 until end of turn.

Lights — 2, 5, 6

Visit — Creatures you control get +1/+0 until end of turn.

Lights — 3, 5, 6

, : Tap all other artifacts. They don't untap during their controllers' untap steps for as long as Kill Switch remains tapped.

When Killer's Mask enters, manifest dread, then attach Killer's Mask to that creature. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.)

Equipped creature has menace.

Equip

Spells you cast that refer to artifacts or Contraptions in their rules text cost less to cast.

Equipped creature gets +0/+3.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

During your turn, equipped creature gets +1/+0 and has first strike.

, Sacrifice Knife: Draw a card.

Equip

First strike, protection from even collector numbers (Nothing with an even collector number can block, target, deal damage to, or attach to this creature.)

First strike, protection from odd collector numbers (Nothing with an odd collector number can block, target, deal damage to, or attach to this creature.)

First strike, protection from watermarks (Nothing with a watermark can block, target, deal damage to, or attach to this creature.)

Trample

Rapid-fire Battle Cannon — When Knight Paladin enters, it deals 4 damage to each opponent.

Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)

Whenever one or more +1/+1 counters are put on Knighted Myr, it gains double strike until end of turn.

, : Exile the top card of your library face down.

: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled with Knowledge Vault into their owner's hand.

When Knowledge Vault leaves the battlefield, put all cards exiled with Knowledge Vault into their owner's graveyard.

Menace

Equipped creature gets +2/+2 and has menace.

Whenever Komainu Battle Armor or equipped creature deals combat damage to a player, goad each creature that player controls.

Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Equipped creature gets +1/+1 and has vigilance.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Whenever a player casts a blue spell, you may gain 1 life.

If you would roll a die, instead roll two of those dice and ignore one of those results.

Flying, trample

When Krenko's Buzzcrusher enters, for each player, destroy up to one nonbasic land that player controls. For each land destroyed this way, its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.

, : Prevent all damage that would be dealt this turn by target creature you control. That creature gets +0/+X until end of turn, where X is its mana value.

Equipped creature has ": This creature gets +1/+0 until end of turn."

Whenever equipped creature deals damage to a blocking creature, Kusari-Gama deals that much damage to each other creature defending player controls.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

At the beginning of your upkeep, you may exile the top card of your library face down.

, Discard your hand, Sacrifice Kyren Archive: Put all cards exiled with Kyren Archive into their owner's hand.

When this creature enters, return target host card or card with augment from your graveyard to your hand.

Players play with the top card of their libraries revealed.

, Sacrifice Lantern of Insight: Target player shuffles.

When Lantern of the Lost enters, exile target card from a graveyard.

, , Exile Lantern of the Lost: Exile all cards from all graveyards, then draw a card.

Whenever a player casts a blue spell, you may pay . If you do, untap target permanent.

: Add one mana of any color.

, : Tap target artifact.

, : Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

, : Goad target creature. (Until your next turn, it attacks each combat if able and attacks a player other than you if able.)

: Add .

At the beginning of each player's upkeep, that player may put a doom counter on Lavabrink Floodgates or remove a doom counter from it. Then if it has three or more doom counters on it, sacrifice Lavabrink Floodgates. When you do, it deals 6 damage to each creature.

Whenever Lead Golem attacks, it doesn't untap during its controller's next untap step.

Trample

Sacrifice Lead-Belly Chimera: Put a +2/+2 counter on target Chimera creature. It gains trample. <I>(This effect lasts indefinitely.)</I>

Put a card from your hand on top of your library: Return Leashling to its owner's hand.

Lifelink

Equipped creature has lifelink.

Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

: Exile target permanent.

If Legacy Weapon would be put into a graveyard from anywhere, reveal Legacy Weapon and shuffle it into its owner's library instead.

When Lembas enters, scry 1, then draw a card.

, , Sacrifice Lembas: You gain 3 life.

When Lembas is put into a graveyard from the battlefield, its owner shuffles it into their library.

Flash (You may cast this spell any time you could cast an instant.)

, Sacrifice Leonin Bladetrap: It deals 2 damage to each attacking creature without flying.

Equipped creature gets +1/+1.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

As an additional cost to cast this spell, discard a card.

: Lesser Masticore deals 1 damage to target creature.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

: Add one mana of any color.

, , Sacrifice Letter of Acceptance: Draw a card.