Stats for Cerberus, Giant Spider and Stone Gargoyle

[Cherno]

Hello fellow Lurkers and Threshold Agents,

I'm planning a Strange Aeons campaign based on the 1997 PC game "Blood" by Monolith Productions. In the game's storyline, three bosses appear:

Cheogh, a flying Stone Gargoyle that shoots energy blasts from his eyes


Shial, a Giant Spider that spawns little spiders but doesn't attack directly


Cerberus, a huge two-headed dog that breathes flames and shoots fireballs.


Is there any way to give these special creatures stats with the Strange Aeons rules? They should obviously be pretty tough. Especially a fight against the mother spider could prove to be interesting because the constant spawning of her eight-legged children   

The spider could even be re-used as a Leng Spider, should other player wish to fight in the dreamlands...