i stumbled upon this card while surfing on
www.mtgnews.com:
Blessed Breath -
Instant - Arcane
Target creature you control gains protection from the color of your choice until end of turn.
Splice onto Arcane W (As you play an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)
1/306
Common
pretty selfexplanatory, i'm guessing there are lots of other small interactions with arcane spells (like thief of hope), rather than the whole mechanic being streamlined, because at the moment it looks quite narrow.