Dust Bowl

{T}: Add {C}.
{3}, {T}, Sacrifice a land: Destroy target nonbasic land.

Faerie Conclave

This land enters tapped.
{T}: Add {U}.
{1}{U}: This land becomes a 2/1 blue Faerie creature with flying until end of turn. It's still a land.

Island

Mountain

Shivan Reef

{T}: Add {C}.
{T}: Add {U} or {R}. This land deals 1 damage to you.

Wooded Foothills

{T}, Pay 1 life, Sacrifice this land: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

Grim Lavamancer

{R}, {T}, Exile two cards from your graveyard: This creature deals 2 damage to any target.

Masticore

At the beginning of your upkeep, sacrifice this creature unless you discard a card.
{2}: This creature deals 1 damage to target creature.
{2}: Regenerate this creature.

Morphling

{U}: Untap this creature.
{U}: This creature gains flying until end of turn.
{U}: This creature gains shroud until end of turn. (It can't be the target of spells or abilities.)
{1}: This creature gets +1/-1 until end of turn.
{1}: This creature gets -1/+1 until end of turn.

Ophidian

Whenever this creature attacks and isn't blocked, you may draw a card. If you do, this creature assigns no combat damage this turn.

Boomerang

Return target permanent to its owner's hand.

Counterspell

Fact or Fiction

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Fire

Fire deals 2 damage divided as you choose among one or two targets.

Fire // Ice

Lightning Bolt

Toralf's Disciple

Thayan Evokers

Indris, the Hydrostatic Surge

Lightning Bolt deals 3 damage to any target.

Mana Leak

Counter target spell unless its controller pays {3}.

Prohibit

Kicker {2} (You may pay an additional {2} as you cast this spell.)
Counter target spell if its mana value is 2 or less. If this spell was kicked, counter that spell if its mana value is 4 or less instead.

Annul

Counter target artifact or enchantment spell.

Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Dominate

Gain control of target creature with mana value X or less.

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Phyrexian Furnace

{T}: Exile the bottom card of target player's graveyard.
{1}, Sacrifice this artifact: Exile target card from a graveyard. Draw a card.

Powder Keg

At the beginning of your upkeep, you may put a fuse counter on this artifact.
{T}, Sacrifice this artifact: Destroy each artifact and creature with mana value equal to the number of fuse counters on this artifact.

Manasources	Probability
1	98.09%
2	86.92%
3	61.00%
4	29.95%
5	9.24%
6	1.57%
7	0.11%

Color Pip	Probability
	89.60%
	80.31%
	46.84%
	39.40%
	0.00%
	0.00%

The Solution

Lands (25)

Creatures (12)

Instants (24)

Sideboard (15)

Probability of drawing any mana sources in your first 7 cards

Probability of drawing a mana source of a specific color pip in your first 7 cards

Mana Cost Distribution

Mana Density