I purchased this item after reading positive comments on the Mythic site, nice and easy to use with a great variety of exotic creatures that can be generated. One of my favourites was for a D&D campaign I am running, a Flatfish that lurks on dungeon ceilings then drops onto its victims and crushes them, at 2+1 hd with Chainmail level of armour its no push over. This would work equally well in a sci-fi setting, at $5.00 its a bargain, go on, treat yourself.