...I didn't realize it until BWE 3. >.>

I find it a lot more clutch than the other weapons, but much more fun if you pair it up with the scepter, for 2 blocks, which when timed right create 2 clones.

Then just spawn the sword phantasm let it combo and do damage, and then shatter.

Hopefully you've been attacking with scepter 1, so that you'll have another whole batch of clones ready to go right afterwards.