Explosive Shuriken only applies secondary effect in AoE.

[Ghostpilot]

The capstone power of Martial Assault, Explosive Shuriken, only applies the primary damage to a single target and the secondary minor DoT effect in an AoE, despite the power itself indicating that it's an AoE.

 

 

 

[Super Homer]

That was intentional, normally, Assault sets don't get ranged targeted AoE attacks, just cones or PBAoE.

 

It's not that uncommon for a power to be flagged as AoE, it's the only way to add "splash" damage in the game, at least as of shutdown.

 

It does a lot of damage to it's primary target as it is, it would be quite OP if it did the full amount to everything.