Any way to build an attack that creates slippery areas?

Pretty much what the title says, how would you build an attack that makes an area that forces anyone entering it to roll against DX or become prone? Area Effect and Persistent are given, but is this an Affliction with a custom modifier or maybe a crushing attack with No Wounding? Affliction with stun and Based on DX? I really can't come up with anything else, and those feel somewhat clunky way of doing it.

Any way to build an attack that creates slippery areas?