Have a character make a wall

[-Whiplash-]

I want to make a move where a character makes a shield in front of them that:

Blocks projectiles
knocks back enemies for one hit
and doesn't go away until the move it over.

how would one go about doing such a thing?

[Cyanide]

Helper, give it a large clsn2 and turn on playerpush. The one hit thing is managed by allowing it to deal said hit and using statetypeset/varset on movehit to change the movetype from A to I. Push will still work, attacking won't. Also you don't want p2 to randomly go into guarding states if he pushes backwards