Dual Hack
Source: Diamond Spheres: Thaumic Potential
Prerequisite: Spellhacking sphere.
Benefit: Whenever you use hack magic as a standard action or longer, you can hack two targets instead of one–both targets must still be in range. If you apply the same (hack) talent to both targets and the talent allows you to redistribute a bonus (or other statistic) that the target grants or possesses, you can distribute the bonuses between both hacked targets. Any bonuses redistributed this way must still be valid to the new target, and they must be the same type of item (such as a weapon or shield).
For example, you can use Shift Enchantment to remove a +1 enhancement bonus from a +2 longsword and grant it to a +3 greatsword.
If you possess the Repurpose Activated Item talent and apply it to both targets when hacking this way, you can use either object’s associated school of magic or magic sphere when choosing the new function granted to the hacked items.
Instant Defensive Hack
Prerequisites: Associated skill 7 ranks, Spellhacking sphere, Prepared Hacking.
Benefit: When another creature you are aware of casts a spell or other magical effect that targets you or includes you in its area, you can outwit that creature as a cost to use hack magic as an immediate action to alter that spell or effect.
Prepared Hacking
Prerequisite: Spellhacking sphere.
Benefit: You can take a special move action to prepare yourself to hack magic using your spellhacking instrument to alter a magical effect as it activates. Unlike using the ready action, this feat allows you to react to your own action and doesn’t alter your initiative count. This can also be prepared to hack a magic item or trap as it activates, as long as you are aware of it and the item’s caster level or trap’s challenge rating is less than the number of ranks in the Spellhacking sphere’s associated skill you possess.
You can hack the effect as part of its casting or activation if you cast the effect or produce the effect from an item you wear or wield. If you target another creature’s effect or an item or trap, you may hack the effect as an immediate action (after spending the move action to ready yourself).