Hello everyone, my apologies if this has been answered elsewhere, so my question is in regards to the improved targeting symbol shoot and destroy a wall.

My apologies for not having a picture of him but he is the LE Magneto from Regenesis who has a Pulse wave with the brown box with the explosion in it.

Can he use pulse wave through only one blocking or would he destroy all blocking terrain in his pulse wave range? Thank you.

To quote the effect:
"Once per range attack, this character can draw a line of fire through one piece of Blocking terrain.
Immediately after the attack resolves, destroy that piece of Blocking terrain."

So when you're drawing multiple lines of fire, you pick one of them going through a wall and destroy that wall. That also means that the other squares of blocking/walls block LOF and you can't hit more than one character through blocking.

For a bit of history, pre- 2017 rules let you destroy all squares of blocking/ walls that you drew LOF through... that's been reigned in.

thanks for your clarification!!

This makes Magneto surprisingly better.