If a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)

Target creature gets -X/-X until end of turn. You gain X life.

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.

{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.

Look at the top three cards of target player's library. Exile any number of those cards, then put the rest back in any order.

Transmute {1}{B}{B} ({1}{B}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

{2}{G}, {T}: Return target enchantment card from your graveyard to your hand.

Constellation -- Whenever Eidolon of Blossoms or another enchantment enters the battlefield under your control, draw a card.

Electrodominance deals X damage to any target. You may cast a spell with mana value X or less from your hand without paying its mana cost.

Choose one --

• Target creature gets -X/-X until end of turn. You gain X life.

• Exile up to twice X target cards from graveyards.

Return target permanent card from your graveyard to your hand. If a creature died this turn, create two 1/1 green Saproling creature tokens.

Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, Harsh Mentor deals 2 damage to that player.

Enchantment spells you cast cost {1} less to cast.

Whenever you cast an enchantment spell, you gain 1 life.

Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, Immolation Shaman deals 1 damage to that player.

{3}{R}{R}: Immolation Shaman gets +3/+3 and gains menace until end of turn.

Enchant creature

Enchanted creature can attack as though it had haste.

{0}: Untap enchanted creature. Activate only during your turn and only once each turn.

Choose one --

• Exile target player's graveyard.

• Jund Charm deals 2 damage to each creature.

• Put two +1/+1 counters on target creature.

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

Enchant creature

{B}: Regenerate enchanted creature.

{R}: Enchanted creature gets +1/+0 until end of turn.

{G}: Enchanted creature gains trample until end of turn.

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

Destroy target artifact or enchantment.

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

Flying

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

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

Destroy target nonland permanent and all other permanents with the same name as that permanent.

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

{1}: Add {B} or {R}. Activate no more than three times each turn.

{1}{B}: Exile target card from an opponent's graveyard. If no cards are in that graveyard, flip Nezumi Graverobber.

{4}{B}: Put target creature card from a graveyard onto the battlefield under your control.

{G}: Add one mana of any color.

Choose one --

• Counter target spell if it's blue.

• Destroy target permanent if it's blue.

As Quirion Elves enters the battlefield, choose a color.

{T}: Add {G}.

{T}: Add one mana of the chosen color.

Choose one --

• Exile target player's graveyard.

• Destroy target artifact.

• Each creature deals 1 damage to its controller.

Choose one --

• Counter target blue spell.

• Destroy target blue permanent.

Return target card from your graveyard to your hand.

At the beginning of each player's upkeep, Roiling Vortex deals 1 damage to them.

Whenever a player casts a spell, if no mana was spent to cast that spell, Roiling Vortex deals 5 damage to that player.

{R}: Your opponents can't gain life this turn.

Rolling Earthquake deals X damage to each creature without horsemanship and each player.

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

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

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

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Whenever you cast an enchantment spell, you may draw a card.

Vintara Snapper has shroud as long as you control no untapped lands. (It can't be the target of spells or abilities.)

Whenever an opponent taps a land for mana, tap all lands that player controls.

If a creature an opponent controls attacks, all creatures that opponent controls attack if able.

Each player secretly chooses a number 0 or greater, then all players reveal those numbers simultaneously and determine the highest and lowest numbers revealed this way. Wheel of Misfortune deals damage equal to the highest number to each player who chose that number. Each player who didn't choose the lowest number discards their hand, then draws seven cards.

{T}: Add {G}.

Whenever you tap Zhur-Taa Druid for mana, it deals 1 damage to each opponent.