a) Praying implies asking for; spelling implies offering to.

b) Those who suggest spells tempt others to pray in spells for suggested.

c) Asking implies a suggested spell...a request; petition; counsel; claim; inquiry; an invite etc.

Look into the origin of "be it as it is axed"...

d) In reality...for (forward) and to (toward) imply motion aka origin (inception towards death) of being (forwards life).