The caster can, as a Free Action, refresh the effect (including any required tests or rolls, not including the casting test, using the original target(s)) and duration of this spell when it ends by paying the original cost that they paid for the spell as long as the requirements for the spell (like range) are still met. If the spell has no listed duration, then treat the effect as having a 1 round duration for the purposes of upkeep. Additionally, spells with no listed duration cannot be if they have cast a different spell since the original cast of the upkept spell. If a spell has the Attack (Spell Attribute), then upkeeping the spell counts toward the maximum attacks per round limit.