The Mana Cost Game

[lookingupanddown]

Obzedat's Judgment WBB
Instant
Destroy target creature, enchantment, or planeswalker. Its controller loses 3 life,
An execution ordered all the way from Orzhova is paid for by the family of the punished.

Next: WWB

[OneAndOnly]

Menial Thrull -- WWB
Creature - Thrull
(W/B)(W/B): Sacrifice Menial Thrull: Gain one life. Target player loses one life. Put a +1/+1 counter on up to one target creature.
2/2
.
Next: (0/B) (Zero mana or B; e.g., twobrid mana but with 0 instead of 2.)

Edit: Thanks for the reminder!

[Levin]

@OneAndOnly, next cost please.

[JovialJovian]

Faded Shade (0/B)
Creature - Shade
Faded Shade enters the battlefield with a number of +1/+1 counters on it equal to the amount of mana spent to cast it.
3: Faded Shade gets +1/+1 until end of turn, this ability costs 1 less to activate if Faded Shade has a +1/+1 counter on it.
0/1

Next: 2URG

[lookingupanddown]

Draconic Elemental 2GUR
Creature - Dragon Elemental
Flying, trample, haste
2: Scry 1. Draconic Elemental gets +1/+0 until end of turn.
GUR: Untap Draconic Elemental. It deals 2 damage to target attacking creature.
3/3

Next: 4UR

[folding_music]

Separate Atoms 4ur
Sorcery
Buyback 2uu
Separate Atoms deals 6 damage to target creature. If that creature dies this way, create a 6/1 red Elemental creature token with haste, trample and "At the end of each turn, sacrifice this creature."

next: , and you can't write "If you paid life to cast ~" on it =P

[OneAndOnly]

Dreadful Thoughts --
Instant
Mill a card, scry 1, then mill a card.
Desperation -- Then, if your life total is less than the number of cards in your hand, choose one -- Your life total becomes equal to the number of cards in your hand; or draw cards equal to your life total.
.
Next: 0/R, to continue the cycle of "zero-brid" cards I've been suggesting.

[Levin]

Inner Force – {0/r}
Instant (U)
Target creature gains haste and +X/+X until end of turn, where X is the amount of mana you spent to cast this spell.
Next: ((x)+)((c)+)* (Cost must include xc, but may include any other mana symbols)

[lookingupanddown]

Distortion Force X1CC
Creature - Eldrazi
Menace
Distortion Force enters the battlefield with X +1/+1 counters on it.
At the beginning of your upkeep, you may remove any number of +1/+1 counters from Distortion Force. If you do, destroy target colored permanent with mana value less than or equal to the amount of counters removed this way.
The influence of Kozilek's brood bends reality until it breaks.
2/2

Next: 0/G

[folding_music]

Kelsinko Blowdarter or
Creature - Ouphe Archer (U)
When Kelsinko Blowdarter enters the battlefield, it deals 1 damage to target creature with flying, 1 damage to you and 1 damage to itself.
Kelsinko Blowdarter gets +0/+1 for each tapped Forest you control.
0/1

(giggling at this traincrash)

next: xs

[OneAndOnly]

Ice Over -- XS
Sorcery
Put X stun counters and X shield counters on target non-snow creature.
.
Next: (B/R)(B/R)(B/R)(B/R)

[folding_music]

Burn the Farmer's Field
Enchantment (R)
When Burn the Farmer's Field enters the battlefield, if you cast it, exile target land.
At the beginning of your upkeep, each Plains deals 1 damage to its controller.
Douse the flames! -- Pay 2 life, Discard a card at random: Destroy Burn the Farmer's Field. Any player may play this ability.

next: 7g

[JovialJovian]

Humongify 7G
Instant
This spell costs X less to cast, where X is the power of the creature it targets.
Target creature has base power and toughness 9/9 until end of turn.

next: 3UUUB

[OneAndOnly]

That's pretty elegant!
.
Mindwrack Sphinx -- 3UUUB
Creature - Sphinx
Flying
When Mindwrack Sphinx enters the battlefield, exile the top card of each player's library. You may cast those cards from exile without paying their mana cost. Whenever you cast a spell this way, its owner mills cards and loses life equal to its mana value.
5/4
.
Next: RUUUG

[lookingupanddown]

Temur Hurricane RUUUG
Sorcery
Return all creatures you don't control to their owners' hands. Creatures you control get +2/+0 and gain vigilance until end of turn.
From beyond the Qal Sisma mountains came a thunderstorm seem only once a century. In its wake came the Temur, ready to collect what remained.

Next: 2(r/p)(w/p)

[OneAndOnly]

Shatter the Spirit -- 2(RP)(WP)
Sorcery
Shatter the Spirit deals four damage distributed amongst any number of creatures and battles of your choice. Creatures dealt damage this way can't block this turn, and battles dealt damage this way can't be protected this turn.

Next: 9

[JovialJovian]

Memorial of Mirrodin 9
Artifact (M)
Nonartifact spells you cast have affinity for artifacts.
Each nonland permanent you control is an artifact in addition to its other types.
Whenever you cast a spell, create a 1/1 colorless Myr artifact creature token.
The scars left by Phyrexia will never be forgotten.

Next: RRRRRR

[folding_music]

Deep Mine Network rrrrrr
Enchantment - Aura
Enchant mountain
Enchanted land has ": Add rrrrr."
Sacrifice Deep Mine Network: Choose a creature type. Creatures you control of that type gain mountainwalk and get +5/+1 until end of turn.

next: bb

[lookingupanddown]

Decapitate BB
Sorcery
Kicker 1
Target creature gets -5/-5 until end of turn. If Decapitate was kicked, that creature's controller loses 2 life.
"It takes some time to align the blade with the space between vertebrae, but the reaction of the public is always worth it."
—Ob Nixilis

Next: 2W

[void_nothing]

Brilliant Sunray 2W
Instant
Exile target nonwhite attacking creature. If that creature is black or red, create a 1/1 white Spirit creature token with flying. If that creature is green or blue, draw a card.
Plainscycling 2

Next: 4RW

[Komandon]

Gate Guardian 4RW
Creature - Giant Solider
As long as Gate Guardian is untapped gates you control are indestructible.
Whenever you cast a creature spell, if mana from a gate's mana ability was spent to cast it, that creature enters the battlefield with haste and +1/+1 until end of turn.
If you control control five or more gates with different names Gate Guardian gains +1/+1, trample and vigilance.
4/4

Next : {2/U}{2/U}{2/U}

[JovialJovian]

Hydrotherm Weird (2/U)(2/U)(2/U)
Creature - Weird
When Hydrotherm Weird enters the battlefield, if at least UUU was spent to cast it, draw a card.
When Hydrotherm Weird enters the battlefield, if at least RRR was spent to cast it, it deals 3 damage to any target.
3/3

Next: 1RGW

[lookingupanddown]

Gaze of the Anima 1RGW
Instant
Look at the top six cards of your library. Reveal any number of creature cards from among them with 5 power or greater, then choose one of those cards. Put that card onto the battlefield tapped, the other revealed cards into your hand, and the rest on the top of your library in any order.

Next: CC

[Komandon]

Sudden Concealment CC
Instant
Up to three nonland permanents you control phase out. If any are an attacking or blocking creature, you may put a +1/+1 counter on them first. Treat them and anything attached to them as though they don't exist until your next turn.

Next: 5{w/p}{u/p}{b/p}{r/p}{g/p}

[folding_music]

Jodah, the Putrefier
Legendary Creature - Phyrexian Wizard (M)
Skip your draw phase.
Whenever a card enters your graveyard from anywhere, exile it.
At the end of each turn, return target card that's all five colors from your graveyard to your hand. If you do, each opponent loses life equal to that card's mana value and you gain that much life. Otherwise, sacrifice Jodah, the Putrefier.
5/5

SPOILER

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Quintuple Agent
Creature - Phyrexian Assassin (C)
Infect, intimidate
5/5

:)

next... uh