Skill effects and ground effects

Development Asset Creation FX
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Hello
I have been playing with cascade and have learnt all the basics,and made some cool effects with them. but im wanting to take it a step up, I wish to recreate skill effects commonly seen in mmos with buff and AOE effects. example;
- YouTube

im having problems with the part of the effect that expands on the ground. E.G the snowflake like thing that expands outwards. i just seem to be unable to achieve this, Can anyone help Thankyou?