Phil Lewis / Richard Abbott / Dale Hurst / Unknown
The creatures were released in two groups, the first batch in June 1984 were all solid based and mostly sculpted by Nick Bibby. A second batch were released in January 1985, a mix of solid and slotta based. The January 1985 flyer shows the six legged female Chaos Demon in this range, but not the two-headed Chaos Demon, Basilisk or Giant Snail. Things were sorted out by Compendium 3!
The Wereboar was only shown in the Agmat Catalogs.
I included the C29 Giant Owl and Gaint Beetle for comparison. Spot from McDeath is also shown.