Demon Night and Thorny Grave

Demon Night and Thorny Grave are two attack Psynergies available to the Samurai class series, thus only Venus and Mars Adepts have access to them. Both Psynergies are Venus based and both have a chance to haunt a foe. Both also have a range of three.

Demon Night
Demon Night "Strike with a myriad of monsters": Demon Night is available to an Adept who is a member of the Samurai class. It is learned at level 18 and costs 12 PP and has a base attack of 60.

Thorny Grave
Thorny Grave is available when and Adept becomes a member of the Ronin class, and is therefore unavailable in Golden Sun. It replaces Demon Night and increases the base damage to 170. The PP required also doubles, meaning that the Psynergy costs 24 PP.