If you would lose unspent mana, that mana becomes black instead. At the beginning of your first main phase, look at the top card of your library. You may reveal that card if it has three or more colored mana symbols in its mana cost. If you do, add three mana in any combination of its colors and put it into your hand. If you don't reveal it, put it into your hand.

{3}, {T}: Double the amount of each type of unspent mana you have.

When you cast this spell, you gain half X life and draw half X cards. Round down each time. Flying, trample This creature enters with X +1/+1 counters on it.

Equipped creature gets +2/+2 and has protection from black and from green. Whenever equipped creature deals combat damage to a player, that player discards a card and you untap all lands you control. Equip {2}

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.) Flying, ward {2} Warp Blast — When this creature enters, it deals X damage to any target.

Counter target spell.

Target player draws X cards. Shuffle Blue Sun's Zenith into its owner's library.

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

Equipped creature gets +2/+2 and has protection from instants and from sorceries. Whenever equipped creature deals combat damage to a player, create a Treasure token. When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy. Equip {2}

You gain X life and draw X cards.

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.

Return X target nonland permanents to their owners' hands.

Flying Whenever you cast a spell, put a +1/+1 counter on Ramos for each of that spell's colors. Remove five +1/+1 counters from Ramos: Add {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}. Activate only once each turn.

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

{T}: Add one mana of any color that a land an opponent controls could produce.

Whenever you cast a spell with {X} in its mana cost, put two charge counters on this artifact. {T}: Add one mana of any color. {T}: Add {C} for each charge counter on this artifact. Spend this mana only on costs that contain {X}.

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

When you next cast an instant or sorcery spell this turn, copy that spell X times. You may choose new targets for the copies.

Trample This creature enters with X +1/+1 counters on it. When this creature dies, you gain life and draw cards equal to its power.

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

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

Choose one — • Draw X cards. • Invoke the Firemind deals X damage to any target.

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

Deathtouch {T}: Add two mana of any one color. Whenever you cast a spell with {X} in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it.

Draw X cards, then discard a card.

Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent of their choice or discards a card.

{T}: Add {C}{C}{C}{C}. Spend this mana only on costs that contain {X}.

Indestructible As long as your devotion to green and blue is less than seven, Kruphix isn't a creature. You have no maximum hand size. If you would lose unspent mana, that mana becomes colorless instead.

Vigilance, reach, trample When Zacama enters, if you cast it, untap all lands you control. {2}{R}: Zacama deals 3 damage to target creature. {2}{G}: Destroy target artifact or enchantment. {2}{W}: You gain 3 life.

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.) This artifact enters with a charge counter on it for each time it was kicked. {T}: Add {C} for each charge counter on this artifact.

Flash Indestructible When Mithril Coat enters, attach it to target legendary creature you control. Equipped creature has indestructible. Equip {3}

This land enters tapped. {T}: Add {G}, {W}, or {U}.

Enchant legendary creature Enchanted creature has ward {2} and "{T}: Add five mana in any combination of colors. Spend this mana only to cast spells."

Whenever you cast a permanent spell with a mana cost that contains {X}, double the value of X. Whenever you cast an instant or sorcery spell or activate an ability, if that spell's mana cost or that ability's activation cost contains {X}, copy that spell or ability. You may choose new targets for the copy.

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

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {G} or {U}.

Whenever you cast your first instant or sorcery spell each turn, copy that spell. You may choose new targets for the copy.

Enchant creature Enchanted creature gets +2/+2 and has "Whenever this creature attacks, untap all lands you control." Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Create X 2/2 white Soldier creature tokens with vigilance. If X is 10 or more, also create X 4/4 white Angel creature tokens with flying and vigilance.

You gain X life. Create X 1/1 colorless Phyrexian Mite artifact creature tokens with toxic 1 and "This token can't block." If X is 5 or more, destroy all other creatures. (Players dealt combat damage by a creature with toxic 1 also get a poison counter.)

Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.) Exile Teferi's Protection.

At the beginning of your end step, untap all lands you control.

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

This creature enters with X +1/+1 counters on it. {4}: Put a +1/+1 counter on this creature. Remove a +1/+1 counter from this creature: It deals 1 damage to any target.

({T}: Add {U}, {B}, or {R}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

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

At the beginning of each upkeep, untap all creatures and lands.

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

You may play an additional land on each of your turns. Lands you control are every basic land type in addition to their other types.

({2/B} can be paid with any two mana or with {B}. This card's mana value is 6.) Search your library for a card with mana value less than or equal to the number of lands you control, reveal it, put it into your hand, then shuffle.