Protection from red

When Lavinia of the Tenth enters, detain each nonland permanent your opponents control with mana value 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Vigilance

Whenever you cast your second spell each turn, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

: Add . Activate only during an opponent's turn.

When Lawless Broker dies, put a +1/+1 counter on target creature you control.

First strike

When Layla Hassan enters and whenever one or more Assassins you control deal combat damage to a player, return target historic card from your graveyard to your hand.

Whenever you commit a crime, put a +1/+1 counter on Lazav, Familiar Stranger. Then you may exile a card from a graveyard. If a creature card was exiled this way, you may have Lazav become a copy of that card until end of turn. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Whenever Lazav, Wearer of Faces attacks, exile target card from a graveyard, then investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Clue, you may have Lazav become a copy of a creature card exiled with it until end of turn.

You may have Lazotep Convert enter as a copy of any creature card in a graveyard, except it's a 4/4 black Zombie in addition to its other colors and types.

Sliver creatures you control have afflict 2. (Whenever a creature with afflict 2 becomes blocked, defending player loses 2 life.)

Whenever a nontoken Sliver you control dies, amass Slivers 2. (Put two +1/+1 counters on an Army you control. It's also a Sliver. If you don't control an Army, create a 0/0 black Sliver Army creature token first.)

Trample

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

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Reach

Enchanted creature gets +2/+2 and has reach.

Other Elves you control get +1/+1.

Whenever you cast an Elf spell, you may pay . If you do, draw a card.

: Add . If you control four or more creatures, add instead.

Leapfrog has flying as long as you've cast an instant or sorcery spell this turn.

: Leaping Master gains flying until end of turn.

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

Whenever Ledev Champion attacks, you may tap any number of untapped creatures you control. Ledev Champion gets +1/+1 until end of turn for each creature tapped this way.

: Create a 1/1 white Soldier creature token with lifelink.

Flying

Whenever a player casts their second spell each turn, Ledger Shredder connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

During your turn, Leech Fanatic has lifelink.

, : Leeching Licid loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.

At the beginning of the upkeep of enchanted creature's controller, Leeching Licid deals 1 damage to that player.

Whenever a Sliver you control attacks, defending player loses 1 life.

Flying

: Leering Gargoyle gets -2/+2 and loses flying until end of turn.

Whenever Leery Fogbeast becomes blocked, prevent all combat damage that would be dealt this turn.

Flying

When Legion Angel enters, you may reveal a card you own named Legion Angel from outside the game and put it into your hand.

, : Legion Guildmage deals 3 damage to each opponent.

, : Tap another target creature.

Haste

Battalion — Whenever Legion Loyalist and at least two other creatures attack, creatures you control gain first strike and trample until end of turn and can't be blocked by creature tokens this turn.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

At the beginning of combat on your turn, create a 1/1 red Goblin creature token. That token gains haste until end of turn and attacks this combat if able.

Reach

Legolas Greenleaf can't be blocked by creatures with power 2 or less.

Whenever another legendary creature you control enters, put a +1/+1 counter on Legolas Greenleaf.

Whenever Legolas Greenleaf deals combat damage to a player, draw a card.

Reach

Whenever you cast a spell that targets Legolas, Master Archer, put a +1/+1 counter on Legolas.

Whenever you cast a spell that targets a creature you don't control, Legolas deals damage equal to its power to up to one target creature.

When Lena, Selfless Champion enters, create a 1/1 white Soldier creature token for each nontoken creature you control.

Sacrifice Lena: Creatures you control with power less than Lena's power gain indestructible until end of turn.

Artifacts you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)

When Leonin Armorguard enters, creatures you control get +1/+1 until end of turn.

As long as Leonin Den-Guard is equipped, it gets +1/+1 and has vigilance.

Heroic — Whenever you cast a spell that targets Leonin Iconoclast, destroy target enchantment creature an opponent controls.

Magecraft — Whenever you cast or copy an instant or sorcery spell, creatures you control get +1/+1 until end of turn.

When Leonin Relic-Warder enters, you may exile target artifact or enchantment.

When Leonin Relic-Warder leaves the battlefield, return the exiled card to the battlefield under its owner's control.

You may activate equip abilities any time you could cast an instant.

When Leonin Snarecaster enters, you may tap target creature.

At the beginning of combat on your turn, if you control three or more creatures, this creature gets +1/+1 until end of turn and you gain 1 life.

Each opponent can't draw more than one card each turn.

Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, you may draw a card.

Whenever Lesser Gargadon attacks or blocks, sacrifice a land.

: If Lesser Werewolf's power is 1 or more, it gets -1/-0 until end of turn and put a -0/-1 counter on target creature blocking or blocked by Lesser Werewolf. Activate only during the declare blockers step.

Trample

Leviathan enters tapped and doesn't untap during your untap step.

At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan.

Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)

: Untap target land.

When Leyline Phantom deals combat damage, return it to its owner's hand. (Return it only if it survived combat.)

Flying

You don't lose unspent red mana as steps and phases end.

When Leyline Tyrant dies, you may pay any amount of . When you do, it deals that much damage to any target.

At the beginning of each combat, each creature you control gets +1/+1 until end of turn if it has the same name as another creature you control or a creature card in your graveyard.

: Another target nontoken creature you control gains first strike and double team until end of turn. Activate only as a sorcery and only once.

When Liberated Livestock dies, create a 1/1 white Cat creature token with lifelink, a 1/1 white Bird creature token with flying, and a 2/4 white Ox creature token. For each of those tokens, you may put an Aura card from your hand and/or graveyard onto the battlefield attached to it.