A Slavemage, Starchild and a Starspwan priest...

[Endoperez]

Perhaps they should walk into the Void Gate. Slavemage goes in and comes out with a group of Lesser Othernesses following him. Starchild and Starspawn tell him he's very good for having gathered all of them. Starchild goes in and appears somewhere else a month later, very much insane, and with a Voidness he calls Mr Fluffy following him everywhere. After he becomes a prophet, Slavemage and Starspawn congratulate him but he doesn't seem to understand. Starspawn throws the Slavemage in, he dies, and after a short war against Ulm (which was won thanks to Mr Fluffy) and another, longer war against Vanheim (during which Starchild died trying to assassinate a Dwarf) a Visitor appears and tells that Slavemages taste like tuna.

[Taqwus]

Relative efficiency depends on magic/drain scale, yes?

...and I was definitely thinking "...walk into a bar." when I saw the thread title.

[Agrajag]

A Slavemage, Starchild and a Starspwan priest walk into the Void Gate.
The Slavemage goes first and returns with no summons.
The Starchild goes second and returns with no summons.
The Starspawn goes third and Fthagn.

[AMF]

fnord