You and target player exchange control of the creature you each control with the highest mana value. Then exchange control of artifacts the same way. If two or more permanents a player controls are tied for highest, their controller chooses one of them.

Whenever you cast your first instant spell each turn, if Kalamax, the Stormsire is tapped, copy that spell. You may choose new targets for the copy.

Whenever you copy an instant spell, put a +1/+1 counter on Kalamax.

Karn's Sylex enters the battlefield 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.

+1: Put a ghostform counter on up to one target nontoken creature. It gains "When this creature dies or is put into exile, return it to its owner's hand and create a 1/1 white Spirit creature token with flying."

−3: Exile target nonland permanent.

−7: You get an emblem with "At the beginning of your upkeep, you may cast a legendary spell from your hand, from your graveyard, or from among cards you own in exile without paying its mana cost."

Menace

Whenever you sacrifice a creature, you may pay . If you do, draw a card. ( can be paid with either or .)

, Sacrifice a creature: Kels, Fight Fixer gains indestructible until end of turn.

Landfall — Whenever a land enters the battlefield under your control, you may put a quest counter on Khalni Heart Expedition.

Remove three quest counters from Khalni Heart Expedition and sacrifice it: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

First strike; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.)

Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles.

When Kroxa enters the battlefield, sacrifice it unless it escaped.

Whenever Kroxa enters the battlefield or attacks, each opponent discards a card, then each opponent who didn't discard a nonland card this way loses 3 life.

Escape—, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Reveal the top six cards of your library. Put up to three enchantment cards from among them into your hand and the rest of the revealed cards into your graveyard.

Your opponents can't cast spells during your turn.

Whenever one or more creatures you control each with power greater than its base power deals combat damage to a player, draw a card.

Menace, ward , haste

Whenever Kylox, Visionary Inventor attacks, sacrifice any number of other creatures, then exile the top X cards of your library, where X is their total power. You may cast any number of instant and/or sorcery spells from among the exiled cards without paying their mana costs.

Flying

When Lamplight Phoenix dies, you may exile it and collect evidence 4. If you do, return Lamplight Phoenix to the battlefield tapped. (To collect evidence 4, exile cards with total mana value 4 or greater from your graveyard.)

Each player discards a card, then loses 1 life, then sacrifices an artifact, a creature, an enchantment, a land, a planeswalker, and a tribal permanent, then exiles a card from their graveyard, then puts the top card of their library into their graveyard, then removes a counter from a permanent they control, then gets a poison counter.

Support 2. (Put a +1/+1 counter on each of up to two target creatures.)

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)

Untap target creature. Until end of turn, it gains hexproof, reach, and "Whenever this creature becomes tapped, it deals damage equal to its power to up to one target creature."

Target creature gets -2/-2 until end of turn. It gets an additional -1/-1 until end of turn for each modified creature you controlled as you cast this spell. (Equipment, Auras you control, and counters are modifications.)

: Add .

: Draw a card. Activate only if you have exactly seven cards in hand.

Vigilance

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

When Liege of the Axe is turned face up, untap it.

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

Lightning Axe deals 5 damage to target creature.

Flying, haste

Lightning Phoenix can't block.

At the beginning of your end step, if an opponent was dealt 3 or more damage this turn, you may pay . If you do, return Lightning Phoenix from your graveyard to the battlefield.

, , Sacrifice Lightning-Core Excavator: It deals 3 damage to any target.

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Whenever one or more +1/+1 counters are put on Lonis, investigate that many times.

Whenever you sacrifice a Clue, put a +1/+1 counter on another target creature you control.

When Lord Xander, the Collector enters the battlefield, target opponent discards half the cards in their hand, rounded down.

Whenever Lord Xander attacks, defending player mills half their library, rounded down.

When Lord Xander dies, target opponent sacrifices half the nonland permanents they control, rounded down.

: Prevent the next 2 damage that would be dealt to any target this turn.

When Loxodon Eavesdropper enters the battlefield, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Whenever you draw your second card each turn, Loxodon Eavesdropper gets +1/+1 and gains vigilance until end of turn.

When Loxodon Hierarch enters the battlefield, you gain 4 life.

, Sacrifice Loxodon Hierarch: Regenerate each creature you control.

, : Tap target creature.

At the beginning of your upkeep, the player with the lowest life total gains control of Loxodon Peacekeeper. If two or more players are tied for lowest life total, you choose one of them, and that player gains control of Loxodon Peacekeeper.

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.)

When Loxodon Restorer enters the battlefield, you gain 4 life.

This spell can't be countered.

If a spell or ability an opponent controls causes you to discard Loxodon Smiter, put it onto the battlefield instead of putting it into your graveyard.

Equipped creature gets +3/+0 and has trample and lifelink.

Equip

Horsemanship (This creature can't be blocked except by creatures with horsemanship.)

Whenever Lu Xun, Scholar General deals damage to an opponent, you may draw a card.

Whenever you cast an artifact creature spell, it gains sunburst. (It enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.)

At the beginning of your end step, if there are thirty or more counters among artifacts and creatures you control, Lux Artillery deals 10 damage to each opponent.

, : You gain 1 life. Put a brick counter on Luxa River Shrine.

: You gain 2 life. Activate only if there are three or more brick counters on Luxa River Shrine.

Target creature gets +X/+X until end of turn. Create a 1/1 green and white Citizen creature token.

Luxury Suite enters the battlefield tapped unless you have two or more opponents.

: Add or .

Reveal cards from the top of your library until you reveal an artifact card. Put that card onto the battlefield and the rest on the bottom of your library in a random order. Madcap Experiment deals damage to you equal to the number of cards revealed this way.

The first spell you cast each turn has cascade. (When you cast your first spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Flying

When Magma Phoenix dies, it deals 3 damage to each creature and each player.

: Return Magma Phoenix from your graveyard to your hand.

Each opponent separates the creatures they control into two piles. For each opponent, you choose one of their piles. Each opponent sacrifices the creatures in their chosen pile. (Piles can be empty.)

, : Add one mana of any color.

When you cast this spell, counter it unless you sacrifice a land.

At the beginning of each player's upkeep, that player sacrifices a land.

When there are no lands on the battlefield, sacrifice Mana Vortex.

Flying

: Add or .

Flying, vigilance, ward

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.)

Create a 2/1 white and black Inkling creature token with flying, a 3/2 red and white Spirit creature token, and a 4/4 blue and red Elemental creature token.

Target creature gets +1/+1 and gains flying until end of turn.

Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

When Merciless Executioner enters the battlefield, each player sacrifices a creature.

: Return target permanent you control to its owner's hand. If it has unearth, instead exile it, then return that card to its owner's hand. Activate only during your turn.