The Onslaught (formerly known as the Jihad) are a fictional team of state sponsored super powered Quraci terrorists published by DC Comics.
 They first appeared in "Suicide Squad" volume 1 #1, and were created by John Ostrander and Luke McDonnell.
Ma'alefa'ak (sometimes known as Malefic) is a fictional comic book supervillain appearing in books published by the American publisher DC Comics, usually depicted as the archenemy of his twin brother, the superhero Martian Manhunter.
 Created by writer John Ostrander and artist Tom Mandrake, the character first appeared in "Martian Manhunter" (vol.
 2) #0 (October 1998).
Black Mask (Roman Sionis) is a fictional supervillain appearing in comic books published by DC Comics.
 Created by Doug Moench and Tom Mandrake, he first appeared in "Batman" #386 (Aug. 1985).
 The character is a brutally sadistic kingpin in Gotham City's criminal underworld who has a fixation with masks.
 Black Mask is an adversary of the superhero Batman and belongs to the collective of enemies that make up his rogues gallery.
The Suicide Squad is the name of two fictional antihero teams appearing in American comic books published by DC Comics.
 The first version of the Suicide Squad debuted in "The Brave and the Bold" #25 (Sept.
 1959), and the second and modern version, created by John Ostrander, debuted in "Legends" #3 (Jan.
 1987).
 One of the two teams saves the world from an threatening race of savages.
Amanda Blake Waller is a fictional character appearing in American comic books published by DC Comics.
 The character first appeared in "Legends" #1 in 1986, and was created by John Ostrander, Len Wein, and John Byrne.
 Amanda Waller is an antagonist and occasional ally to the superheroes of the DC Universe.
Naiad is a fictional water elemental published by DC Comics.
 She first appeared in "Firestorm, the Nuclear Man" vol.
 2 #90 (October 1989), during the four part "Elemental War" storyline that ran to issue #93, and was created by John Ostrander and Tom Mandrake.
Tom Mandrake (born May 26, 1956) is an American comics artist, perhaps best known for his collaborations with writer John Ostrander on several series, including "Grimjack" (from First Comics) and "Firestorm", "The Spectre", and "Martian Manhunter" from DC Comics.
<ref name="John/Tom">John Ostrander and Tom Mandrake collaborations at the Grand Comics Database</ref>
The Hayoth are a fictional team of super powered Israeli supercommandos published by DC Comics.
 They first appeared in "Suicide Squad" vol.
 1 #45, (September 1990), and were created by John Ostrander, Kim Yale and Geof Isherwood.
 The Hayoth's team name is a reference to four holy beasts from the "Zohar", as seen in the "Soncino Zohar" (1934) published as a part of the Soncino Books of the Bible series.
Grimjack is the main character of a comic book originally published by the American company First Comics.
 John Ostrander and Timothy Truman are credited as co-creators of the character, although Ostrander had been developing Grimjack with artist Lenin Delsol before Truman's arrival on the project according to Ostrander's own text piece in "Grimjack" #75.
 In that same essay, the writer also revealed having initially conceived the character to be the star of a series of prose stories, set in a post-apocalyptic Chicago.
"The Janus Directive" was an eleven-part comic book crossover first published by DC Comics between May and June of 1989.
 Among the creators who contributed to the storyline were writers John Ostrander, Kim Yale, Paul Kupperberg, Cary Bates and Greg Weisman and artists John K. Snyder III, Rick Hoberg, Rafael Kayanan, Tom Mandrake and Pat Broderick.

Question: Naiad, who is a fictional water element, was created by John ostrander and Tom Mandrake who collaborated at what Database?
Answer: Grand Comics Database