You don't lose unspent red mana as steps and phases end. Magecraft — Whenever you cast or copy an instant or sorcery spell, discard a card, then draw a card. If this is the second time this ability has resolved this turn, Ashling deals 2 damage to each opponent and each creature they control. If it's the third time, add {R}{R}{R}{R}.

Target player draws X cards and loses X life.

Draw three cards.

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Whenever an opponent activates an ability of a creature or land that isn't a mana ability, you may draw a card.

Players can cast spells and activate abilities only during their own turns.

Players can cast spells only during their own turns.

Permanents you control gain hexproof and indestructible until end of turn.

Banefire deals X damage to any target. If X is 5 or more, this spell can't be countered and the damage can't be prevented.

At the beginning of each player's end step, this enchantment deals X damage to that player, where X is the number of untapped lands they control.

Crackle with Power deals five times X damage to each of up to X targets.

Players can't gain life. At the beginning of each player's upkeep, that player loses half their life, rounded up.

Each opponent loses X life. You gain life equal to the life lost this way.

Shroud (This enchantment can't be the target of spells or abilities.) {X}: Put X tower counters on this enchantment. At the beginning of your upkeep, if there are 100 or more tower counters on this enchantment, you win the game.

Create X 1/1 green Forest Dryad land creature tokens. (They're affected by summoning sickness.)

At the beginning of each postcombat main phase, the active player adds {C}{C} for each of your opponents who lost life this turn. (Damage causes loss of life.)

Flying {T}: Add one mana of any color.

{T}: Exile target land card from a graveyard. Add one mana of any color. {B}, {T}: Exile target instant or sorcery card from a graveyard. Each opponent loses 2 life. {G}, {T}: Exile target creature card from a graveyard. You gain 2 life.

Flash Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

At the beginning of each player's first main phase, that player adds {G}{G}.

Vigilance, trample, haste This creature enters with X +1/+1 counters on it. When this creature dies, create a number of tapped Treasure tokens equal to its power.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

If you would lose unspent mana, that mana becomes colorless instead.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) {T}: Add {B}, {R}, or {G}.

Indestructible As long as your devotion to red and green is less than seven, Klothys isn't a creature. At the beginning of your first main phase, exile target card from a graveyard. If it was a land card, add {R} or {G}. Otherwise, you gain 2 life and Klothys deals 2 damage to each opponent.

Flying You don't lose unspent red mana as steps and phases end. When this creature dies, you may pay any amount of {R}. When you do, it deals that much damage to any target.

At the beginning of each player's first main phase, that player adds {G}{G}.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Afflict 3 (Whenever this creature becomes blocked, defending player loses 3 life.) At the beginning of each of your postcombat main phases, add {R} for each 1 life your opponents have lost this turn.

You don't lose unspent green mana as steps and phases end. Omnath gets +1/+1 for each unspent green mana you have.

X can't be greater than the number of players in the game. Reveal cards from the top of your library until you reveal X land cards. Put those land cards onto the battlefield tapped and the rest on the bottom of your library in a random order.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced, and this enchantment deals 1 damage to the player.

Untap all permanents you control during each other player's untap step.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

({T}: Add {B} or {R}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

This land enters tapped. When this land enters, exile target player's graveyard. {T}: Add {B}.

({T}: Add {R} or {G}.) This land enters tapped unless you control two or more basic lands.

{T}: Add one mana of any color in your commander's color identity.

{T}: Add {C}. {4}: Put two +1/+1 counters on this land. Then you may have it become a 0/0 Elemental creature until end of turn. It's still a land.

This land enters tapped unless you control two or more other lands. {T}: Add {B} or {G}.

This land enters tapped unless you control a Swamp or a Mountain. {T}: Add {B} or {R}.

({T}: Add {G}.)

This land enters tapped unless you control two or more other lands. {T}: Add {B} or {R}.

{T}: Add {C}. {X}{R}{G}, {T}: Target creature gets +X/+0 and gains trample until end of turn.

If you control two or more other lands, this land enters tapped. {T}: Add {G}. {X}{G}: Until end of turn, this land becomes an X/X green Hydra creature. It's still a land. X can't be 0.

This land enters tapped unless you have two or more opponents. {T}: Add {B} or {R}.

({T}: Add {R}.)

({T}: Add {B} or {G}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

You have no maximum hand size. {T}: Add {C}.

This land enters tapped unless you control two or more other lands. {T}: Add {R} or {G}.

This land enters tapped unless you control a Mountain or a Forest. {T}: Add {R} or {G}.

This land enters tapped. {T}: Add {B}, {R}, or {G}.

This land enters tapped unless you have two or more opponents. {T}: Add {R} or {G}.

({T}: Add {R} or {G}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

({T}: Add {B}.)

This land enters tapped unless you have two or more opponents. {T}: Add {B} or {G}.

This land enters tapped unless you control a Swamp or a Forest. {T}: Add {B} or {G}.

Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

Destroy target permanent. Its controller creates a 3/3 green Beast creature token.

This spell costs {1} less to cast for each creature on the battlefield. Blasphemous Act deals 13 damage to each creature.

Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.) Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them.

Destroy each nonland permanent with mana value 2 or less. Add {B} or {G} for each permanent destroyed this way.

Destroy all creatures. They can't be regenerated.

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.) Bio-plasmic Barrage — When this creature enters, it deals X damage to each player and each other creature.

When you cast this spell, each player sacrifices X creatures. This creature enters with two +1/+1 counters on it for each creature sacrificed this way. Flying, trample

Hell to Pay deals X damage to target creature. Create a number of tapped Treasure tokens equal to the amount of excess damage dealt to that creature this way.

Lavalanche deals X damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.

Destroy up to X target artifacts and/or enchantments. Create twice X 1/1 black and green Pest creature tokens with "When this token dies, you gain 1 life."

As an additional cost to cast this spell, pay X life. All creatures get -X/-X until end of turn.

Destroy target artifact you don't control. Overload {4}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Flying If an opponent would lose life during your turn, they lose twice that much life instead. (Damage causes loss of life.)

Whenever a land an opponent controls is tapped for mana, tap all lands that player controls that could produce any type of mana that land could produce.

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

At the beginning of each player's end step, that player sacrifices an untapped land of their choice.

Whenever a land enters, tap all lands its controller controls.