StarryShade

It's actually an incredibly difficult finisher, assuming you mean the 5C 6D. So lets take the most basic variant, 5A 5B 2B 6C jD (jump cancel web nail d5C/5C 6D). The parenthesis is the hard part, because how you jump cancel to web nail is different for all characters (If you hit them low to the ground and late, you did it right; see my vids to see what it should look like. if it hits them early, you messed up), and based on the timing of that, the timing for 5C and whether or not it's a dash changes as well. However, the static aspect of the 5C is you have to hit them just as they are rising out of the web nail, but before they can tech. If you don't let them rise, you get less untechable frames from 5C (as it forces grounded+some number of frames) and the 6D blackbeats. But obviously, if you do the 5C just too late it blackbeats THERE. So it's very very tricky, with tight timing.