well the images shows a glaive missile with a trayectory and missile ARC, a ray and ¿a chain after the glaive?....the first 2 are aeasy... can make a dummy unit to fire the ray, the attacker unit fires the glaive and for the chain im almost sure is a custom effect...
the glaive is a unit.....it is clear that it is a unit cause its color is black, then it has another trigger that moves and another trigger that the chain moves....