The Mana Cost Game

[Ginuqu]

Familiarization
Enchantment
Whenever a creature you don't control becomes the target of a blue spell you control, create a blue 1/1 Homunculus creature token that has that creature's abilities.
Whenever a creature you don't control becomes the target of a black spell you control, create a black Homunculus creature token with power and toughness equal to that creature's power and toughness.

next:

[TheAmericanSpirit]

Stroke of Luck

Instant

Counter target spell or ability that targets a permanent you control. If that permanent was a creature, put 2 +1/+1 counters on it.

Next: XRRRGW

[void_nothing]

Scrambling of Heroes XRRRGW
Sorcery
Exile X target creatures you control. Reveal cards from the top of your library until you reveal a creature card for each creature exiled in this way. Put those creature cards onto the battlefield with X additional +1/+1 counters on each of them and the rest of the revealed cards on the bottom of your library in a random order. Shuffle Scrambling of Heroes into its owner's library.

Next: WUU

[OneAndOnly]

Becalm --
Instant
Counter target spell with converted mana cost less than or equal to your life total.

.

Next:

[Oskeo]

Historian of Kozilek ccuu

creature - eldrazi (U)

Devoid

When ~ enters the battlefield, choose a creature type among creatures your opponents control. While ~ remains on the battlefield, creatures you control lose the eldrazi creature type and instead gain the chosen creature type. (creatures that did not lose the Eldrazi creature type do not gain the chosen creature type. If opponents control no valid creatures, the chosen creature type must be human)

And on that fateful day, the Planeswalkers bound Kozilek and Ulamog to their planar avatars and destroyed them utterly, never to return...

1/3

Next: (null mana cost)

[lookingupanddown]

Moment of Serenity
W Instant
You may cast this spell for 0 during combat if you are attacked by 4 or more creatures.
You gain 5 life. End the current phase. (Remove all attackers and blockers from combat if this was cast during the combat phase. Exile all spells and abilities from the stack, including this spell.)
Splice onto instant 3WW
5WW: Return Moment of Serenity from exile to your hand.
"Breathe."

Next: UUB

[dyd]

Reject the Bloodline UUB
Instant
Counter target creature spell. Each opponent sacrifices a creature with the same name as that spell.


Next: 5(r/g)(r/g)uu

[Oskeo]

Conjureclasm 5{r/g}{r/g}uu

Sorcery (R)

Destroy all creatures. They can't be regenerated. For each creature destroyed this way, it's owner reveals cards from the top of their library until they reveal a creature card. Players place all creature cards revealed this way onto the battlefield. Each player then shuffles the rest of the revealed cards into their library.

Each player may then have one creature they control fight a creature an opponent controlls.

Next: xxb

[lookingupanddown]

Davriel's Erasure XXB
Sorcery
Kicker BB
Look at the target player's hand. If Davriel's Erasure was kicked, you may also look at that player's library. Exile X cards from it face down. If you searched their library this way, that player then shuffles their library. You may look at and play those cards for as long as it remains exiled.
"So you just throw it away? What if we need it later?"
—Davriel Cane, to Jace Beleren

Next: (w/b)(u/r)(b/g)(r/w)(g/u)

[Ginuqu]

Next: (w/b)(u/r)(b/g)(r/w)(g/u)

I don't have a card to add, but I was just running this through my mind and noticed that you can cast it with mana from a shard but not from a wedge. The "become the Avatar of an Alaran Shard" enchantment I was planning to post took up entire screens of text so I'll let someone else handle it!

[dyd]

Enmity (w/b)(u/r)(b/g)(r/w)(g/u)
Enchantment
Whenever an opponent casts a spell, you may cast a spell with the same converted mana cost without paying its mana cost.


Next: sur

[JovialJovian]

Frostbite SUR
Instant
Until end of turn, creatures enter the battlefield tapped, and whenever a creature enters the battlefield, it deals damage equal to its power to its controller and doesn't untap during its controller's next untap step.

Next:
(2/W)(2/W)(2/G)(2/G)

[Ginuqu]

Banner of the Conclave
Artifact
Whenever a nontoken creature you control blocks, create a 3/3 green Centaur creature token that's blocking the same creature.
, : Tap target artifact or creature.

Next:

[lookingupanddown]

Tome of the Spirit Dragon 3C
Artifact
2C, : Scry 2, then manifest the top card of your library.
Whenever one or more colorless creatures you control die, you may pay 1. If you do, untap Tome of the Spirit Dragon.

Next: (w/u)(u/b)(b/r)(r/g)(g/w)

[void_nothing]

Abundant Assistance {W/U}{U/B}{B/R}{R/G}{G/W}
Instant
Create two 1/1 white and blue Soldier creature tokens with vigilance, two Clue tokens, two 1/1 black and red Warrior creature tokens with deathtouch, two Food tokens, and two 1/1 green and white Scout creature tokens with stalwart. (A creature with stalwart can be assigned to block an additional time each combat.)

Next: 2RR

[Ginuqu]

Bomb Ring 2rr
Sorcery
Storm (When you cast this spell, copy it for each spell cast before it this turn.)
Create a Bomb. (It's a 1/1 red Elemental creature token with "At the end of your turn, put a +1/+1 counter on Bomb." and ", Remove any amount of +1/+1 counters from Bomb and sacrifice it: Bomb deals that much damage to any target.")

Next: uuuuu

[Krishnath]

Temporal Flux UUUUU
Legendary Sorcery (M)
Each player shuffles their graveyards, hands, and nonland nonplaneswalker permanents they control into their libraries and draw seven cards.
Take an extra turn after this one.
Exile Temporal Flux.

Next: 3UGB

[lookingupanddown]

Feyomsi, Lord of Ukud 3BGU
Legendary Creature - Cat Demon
Menace
B(g/u): Create three 1/1 black and green Human Warlock creature tokens.
3, : Return target creature or planeswalker with converted mana cost X or less, where X is the number of Human Warlocks you control.
5/5

Next: (rp)(wp)

[Ginuqu]

Renouncers of Vulshok
Creature - Human Barbarian Horror
Lifelink
When Renouncers of Vulshok enters the battlefield, you may sacrifice any number of artifacts you control. Renouncers of Vulshok deals that much damage to target creature or planeswalker.
1/1

Next:

[JovialJovian]

Heaven's Wrath (13)W
Sorcery
Angel offering (You may cast this card any time you could cast an instant by sacrificing an Angel and paying the difference between this and the sacrificed Angel.)
Destroy all non-Angel permanents.

Next: 1C

[lookingupanddown]

Grasp of the Blind Eternities 1C
Instant
Kicker U
Target creature phases out. If Grasp of the Blind Eternities was kicked, that creature phases back in at the beginning of the next end step.
Kallist felt a pull towards an unfathomable direction. It was then that he finally understood what Jace meant when he described how he walks between worlds.

Next: 4

[OneAndOnly]

Hop and a Skip -- 4
Instant
Untap target creature at the beginning of each player's upkeep, until you take your next upkeep step.
.
Next: WUB

[Pygyzy]

Team Building Exercise WUB
Enchantment (Un-R)
Replace all instances of "can't" with "can" and vice versa, in the text box of all cards in all zones.
"I can see us being good friends."

Next:

[lookingupanddown]

Reassembled Conscript (wp)
Artifact Creature - Soldier
As an additional cost to cast Reassembled Conscript, exile a creature card from your graveyard.
"Today is the day of your rebirth. Today, you join us in the glory of Phyrexia!"
—Qal-Sha, Priest of Norn
2/1

Next: (bp)(bp)(bp)

[Pygyzy]

Reassembled Conscript (wp)
Artifact Creature - Soldier
As an additional cost to cast Reassembled Conscript, exile a creature card from your graveyard.
"Today is the day of your rebirth. Today, you join us in the glory of Phyrexia!"
—Qal-Sha, Priest of Norn
2/1

Next?

Hawk of Phyrexia
Creature — Vampire (R)
Flying, deathtouch, lifelink
3/3

Next: uuubbrrr