Spider-Sense

Web-slinging {U} (You may cast this spell for {U} if you also return a tapped creature you control to its owner's hand.)
Counter target instant spell, sorcery spell, or triggered ability.

Breeding Pool

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

Cavern of Souls

As this land enters, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Manasources	Probability
1	100.00%
2	100.00%
3	100.00%
4	100.00%
5	100.00%
6	100.00%
7	46.15%

Color Pip	Probability
	100.00%
	100.00%
	97.90%
	97.90%
	97.90%
	97.90%

Allies

Instants (1)

Lands (12)

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