I just found these on MTGnews.com
Stand/Deliver
Stand: W, Instant
Prevent the next 2 damage that would be dealt to target creature this turn.
Deliver: 2U, Instant
Return target permanent to its owner's hand.
292 David Martin
Pain/Suffering
Pain: B, Sorcery, Target player discards a card from his or her hand.
Suffering: 3R, Sorcery, Destroy target land.
294 David Martin
Wax/Wane
Wax: G, Instant, Target creature gets +2/+2 until end of turn.
Wane: W, Instant, Destroy target enchantment.
296 Ben Thompson
Neil wrote: "They are all uncommon, and the artist is the same for both halfs of the card. There is no flavor text."
The other two are called:
Assault/Battery - Red and Green
Spite/Malice - Blue and Black
By looking at the uncut sheet, there has been an educated guess that Spite/Malice is
Spite U Counter target enchantment spell.
Malice 2B Destroy target nonblack creature.
It said you can only choose one, these are somewhat like the old charms but multicolor(I like the old charms better)
See all the information here
http://www.mtgnews.com/story/569/1/1/1/