 It drifted gently, while Bork pulled a few sticks with runes written on them toward him and made a hasty assembly of them.
Bork pulled sticks with runes for the construction. 
mnli hypothesis: Bork pulled sticks with runes for the construction.  premise:  It drifted gently, while Bork pulled a few sticks with runes written on them toward him and made a hasty assembly of them.