This spell imbues a single creature with great bravery and morale in battle.The target gains a +2 morale bonus on attack rolls, saves, and skill checks.
It no longer stack with Greater Heroism when cast on other characters.
The spell effect is not applied immediately, there is a small delay which can lead to all kinds of unexpected problems. To remove, set the Proj column value to 0 in spells.2da for both Heroism and Greater Heroism spells.
A scribed scroll of Heroism costs 300GP to make, at CL 4. [Source]