Heroes of Might and Magic III: In the Wake of Gods is a massive modification of HMMIII inventing script language and generally intended to stretch the boundaries of the original game capabilities. HMMIII WoG presents new objects with various properties, drastically changed and improved creature abilities and a wide variety of custom scripts for altering the gameplay.
Some new monsters for the WoG 3.58f, released in 2004. Also the video demonstrates the new Commander popular feature, a powerful unit able to level up through battles and possess various skills and spells.
interesting, but video is a bit low resolution so cannot really get a good look of the new monsters.. ^^
The monsters aren't exactly new. WoG 3.58f contains mostly classical concepts which were reutilized for placeholder graphics.