Standby Spell Feat 8
Source Pathfinder Secrets of Magic
Prerequisites Spellstrike
You've honed one spell as your favored combat technique, and you've practiced it enough that you no longer need to prepare it to cast it. Choose a spell in your spellbook that you could use with Spellstrike and that has a level no higher than the highest-level magus spell slot you have. You can Cast this Spell without having it prepared ahead of time by expending a spell slot of a sufficient level to cast your chosen spell. You can change this spell whenever you add new spells to your spellbook, or by studying your spellbook for 1 hour.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
MagusThis indicates abilities from the magus class.