Several components have been changed in this mod. Namely, the jackal of health has been added.
To control the creature, open the console on F3, write enablecheats, then write control scp_999, and to infuse the player into the creature, write setclientcharacter (Player name, select via Tab) (Creature name) - without brackets, Attack - R
Link to the original mod:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2415792862