Gang Up is meant to have the flavor of two players taking down the weakest one by pooling their resources into a mega spell, thus the reason the other player pays.
You probably should re-read corrupt officials it says
Gang Up! 4BB
Sorcery
Choose a player, that player may pay 4. If he or she doesn't counter Gang Up!
Target player with the lowest life total of all players loses the game. Hit 'em while their down!
Corrupt Officials
3WB
Enchantment 5: Gain control of Corrupted Officials. Any player may play this ability.
Creatures you don't control can't attack.
Mark of Persecution 2BB
Enchantment
When Mark of Persecution comes into play choose a player.
Whenever a creature the chosen player controls attacks you, you may pay X, if you do that creature gets -X/-X until end of turn.
Secret Communications Line 2UB
Enchantment
When Secret Communications Line comes into play choose a player.
At the beginning of your upkeep that player draws a card.
At the beginning of that players upkeep, draw a card.
This feels a little overcosted. And definetly G/B but not necessarily hybrid. It's similar to both Steam Vines and Nettlevine Blight.
I think I would cost this somewhere around 5cc. Possibly 2BBG.
Warpmage Adept 2U
Creature - Vedalken Wizard
When Warpmage Adept comes into play draw a card.
When Warpmage Adept leaves play discard a card. UUU: Remove Warpmage Adept from the game. Return it to play at end of turn.
1/2
Solemn Idol 2
Artifact
When Solemn Idol comes into play search your library for a basic land card and put that card onto the battlefield tapped. Then shuffle your library.
Sacrifice Solemn Idol: Draw a card.
Hellquake XRR
Sorcery
Hellquake does X damage to each creature without flying and each player.
Creatures dealt damage by Hellquake can't be regenerated this turn. If a creature dealt damage by Hellquake would be put into a graveyard this turn, remove it from the game instead.
Aether Spike 2UUB
Instant
Destroy target creature. If a creature was destroyed this way counter target spell with converted mana cost less than or equal to that creature's converted mana cost.
Is it really that much better than Spitting Image to warrant a your second version Onlyone? Image has the added benefit of never really going away, while limited to creatures, and is gamebreaking. This copies a single perm. Once. I don't see how this is much more powerful than image. If you're copying you're opps best creature you're paying alot to do it probably, and you can only do it once. If you're copying a legendary, it's probably an overcosted kill spell.
And in my mind worry about killing legendary lands for 2cmc is useless. They printed Hero's Demise, which is basically a worse terror. Why not this at 2cmc as a severly worse creeping mold.
I understand that you're paying more for versatility. But Wargate isn't really that good anyways. And isn't this a worse Wargate? Aren't tutoring effects usually miles better than copy effects?
In my mind Silvercut's version is balanced, although at Sorcery rather than Instant.
I would word it like this.
Scream In The Night
:symu::symb:
Instant
As an additional cost to play Scream In The Night, discard a card with converted mana cost X.
Counter target spell if its converted mana cost is X or less.
turns it into a chrome mox land where i think the objective was to create a any color 2 color land
I riff'd one so Hill Giant!
Thunder King
2RR
Creature - Giant Lord
Haste
Other Giants you control get +1/+1 and have trample.
3/3
Next:Gorilla Warrior
You probably should re-read corrupt officials it says
Creatures you don't control can't attack.
also
all names are placeholders
4BB
Sorcery
Choose a player, that player may pay 4. If he or she doesn't counter Gang Up!
Target player with the lowest life total of all players loses the game.
Hit 'em while their down!
Corrupt Officials
3WB
Enchantment
5: Gain control of Corrupted Officials. Any player may play this ability.
Creatures you don't control can't attack.
Mark of Persecution
2BB
Enchantment
When Mark of Persecution comes into play choose a player.
Whenever a creature the chosen player controls attacks you, you may pay X, if you do that creature gets -X/-X until end of turn.
Secret Communications Line
2UB
Enchantment
When Secret Communications Line comes into play choose a player.
At the beginning of your upkeep that player draws a card.
At the beginning of that players upkeep, draw a card.
I'm not sure you need the upkeep cost.
I think I would cost this somewhere around 5cc. Possibly 2BBG.
Warpmage Adept
2U
Creature - Vedalken Wizard
When Warpmage Adept comes into play draw a card.
When Warpmage Adept leaves play discard a card.
UUU: Remove Warpmage Adept from the game. Return it to play at end of turn.
1/2
Whenever Towering Colobus is blocked, if it would deal damage to a player it deals that damage plus 2 instead.
2
Artifact
When Solemn Idol comes into play search your library for a basic land card and put that card onto the battlefield tapped. Then shuffle your library.
Sacrifice Solemn Idol: Draw a card.
Hellquake
XRR
Sorcery
Hellquake does X damage to each creature without flying and each player.
Creatures dealt damage by Hellquake can't be regenerated this turn. If a creature dealt damage by Hellquake would be put into a graveyard this turn, remove it from the game instead.
Aether Spike
2UUB
Instant
Destroy target creature. If a creature was destroyed this way counter target spell with converted mana cost less than or equal to that creature's converted mana cost.
And in my mind worry about killing legendary lands for 2cmc is useless. They printed Hero's Demise, which is basically a worse terror. Why not this at 2cmc as a severly worse creeping mold.
I understand that you're paying more for versatility. But Wargate isn't really that good anyways. And isn't this a worse Wargate? Aren't tutoring effects usually miles better than copy effects?
In my mind Silvercut's version is balanced, although at Sorcery rather than Instant.
Scream In The Night
:symu::symb:
Instant
As an additional cost to play Scream In The Night, discard a card with converted mana cost X.
Counter target spell if its converted mana cost is X or less.
GWU
Legendary Creature - Human Wizard
Flash
When Nullmage Ancients comes into play, counter target spell.
1/3