In the context of the Selinaverse where Selina Mandrake - The Slayer takes place, The Three are three vampire brother warriors who according to their words, “have been fighting since the beginning of time”. They appear as there young me dressed like Klingons (= the Star Trek race), who at fight using Bat’leths.
They approach Selina, and after she queries them, tell her that the can fight using any weapon, including the “Huge Sword”, which are the ridicously large swords from World of Warcraft. However, they are unable to lift them, and as a result, Selina suggest that they fight using something smaller and not as heavy.
This prompts them in turn to fight using the Wooden Toothpick which causes them to slay one another.