Impair Psynergy series

The Impair Psynergy series is a series of two Mars based Psynergies found in both Golden Sun games that are used to lower the Defense of one or more enemies. This series is available to both of the default class series for the two Mars Adepts, Jenna and Garet, the Flame User and Guard respectively. It is also available to the Brute class series, as long as the class is at Savage or higher, allowing the Venus Adepts Isaac and Felix to learn the series as well.

Psynergy
Impair is available to the Guard and Savage at level 9 while Flame User learns it at level 10. It costs 4 PP and is used to drop the Defense of 1 enemy by 25%, and can be used again to lower it to 50%. The manual to the North American version of The Lost Age, in one instance, incorrectly refers to this Psynergy as "Weaken", which is a different Psynergy of the Jupiter element that lowers Resistance.

Debilitate is available to the Savage and Flame User at level 23 while the Guard must wait until level 26. It costs 6 PP and is used to drop the Defense of up to three enemies by 12.5% and can be used repeatedly, up until 50%.