They call each other that because each group see’s the other as younger versions of their Ancestor and views their own group as the others’ Descendants. So they just call each other Dancestors to reduce confusion and because troll lineage is complicated
He can travel to any time and place using fire as a gateway
It was the Cueball! Vriska was (probably unknowingly) using Equius’s Void abilities to hide it from Doc Scratch but as soon as he found out she had it he was super pissed and exploded it
He had to travel the core of each planet. There he would find a cueball bomb, he had to take the bomb out of the core to a very specific spot on the surface before it’s timer ran out (which got shorter with each planet he conquered). When the timer was finished and the bomb was in its designated location the bomb would go off pushing the planet into range to be pulled into the Black Hole at the center of the session. If Caliborn failed to accomplish this with any of the planets he would automatically lose.