Hello I am Millideath,

I have just figured out a decent combo for a B-G-U deck involving Jaded Response and Spirit Monger:

Jaded Response
Card Color: U
Mana Cost: 1U
Type & Class: Instant
Pow/Tou:
Card Text: Counter target spell if it shares a color with a creature
you control.
Flavor Text: Calm down everyone; it's nothing we haven't seen before.
- Sisay
Artist: Matt Cavotta
Rarity: C
Card #: 26/143
Okay and here is Spirit Monger

Card Name: Spiritmonger
Card Color: Z
Mana Cost: 3BG
Type & Class: Creature - Beast
Pow/Tou: 6/6
Card Text: Whenever Spiritmonger deals damage to a creature,
put a +1/+1 counter on Spiritmonger.

[B]:Regenerate Spiritmonger.

[G]:Spiritmonger becomes the color of your choice until end of turn.
Flavor Text:
Artist: Glen Angus
Rarity: R
Card #: 121/143

Okay this combo works in a mana acceleration deck. First you have Spirit Monger out and then your opponet plays a spell. You use Spirit Mongers color changing ability and make it the color of the spell and then you play Jaded Response and tah-dah! i know this isn't great but what the heck.