advisor

Advisors are the highest-ranking aliens on Half-Life. Their body shape is worm-like and they have robotic devices to enhance their abilities. They have a long, disgusting, long tongue that can inject into numerous materials (e.g. flesh, skin etc. etc.) And it's probably how they feed themselves. They have the ability to levitate and fly. They have telekinetic powers as they can crush, pull/push things with their mind. They have a weird, ancient-looking collar around their... Neck? Anyways, It has some strange signs and it probably means something, meh.