Yes as its a blessing class power "Blessings target afriendly unit(s) and, unless otherwise stated, last until
the end ofthe following turn. Blessings can affect units that are locked in close combat and can affect the Psyker himself."
Remember the str 4 hit meaning you don't want to be casting it on those ridiculously fragile single wound sorcerors.. its only really good if your flying circusing it and casting it on high T creatures.(/ or termie sorcerors I guess)
WTF with all the badges,,