The big ship on the right casts a black hole and sucks the other air ships into it. These are strong units and normally are pretty spaced out so they are safe from splash damage. The black hole however spits everyone back out in the exact same spot so they are momentarily clumped together. So to take advantage of this you have those big blue balls of energy called archons. They have short range, lots of damage, lots of splash, not so good hp/shield so they are kinda of squishy. But if you throw them into the black hole too then they can come out at the same time as the enemies and blow shit up (since clumped enemies + your units in range with lots of splash)

And that’s the archon toilet!