Can someone who has taken the Persistent Spell feat
from the FORGOTTEN REALMS Campaign Setting or the Tome
and Blood book make two different spells persistent? For
example, could a 10th-level level cleric cast shield of faith
from a 5th-level spell slot (giving himself a +3 deflection
bonus to AC) and also cast divine favor from another 5th-
level slot (also giving himself a +3 luck bonus to attacks and
damage) and have both spells last 24 hours (barring
dispelling)?
Persistent Spell is a metamagic feat that works just like any
other metamagic feat. If you have the feat and the spell slots to
spend, you could make every spell you cast persistent, provided
all of them are eligible to receive the feat.