As an alien, you are able to accumulate hosts.

Hosts are made by a crafter, the more a crafter puts into a host the better they are.

When you use a Host Devour you may loose the host if you consume it completely, but you gain much adrenaline back. You may also gain a host if you do a certain amount of damage to another player.

Note: You may use one host over and over again, until they disappear. This depends on how well the host item was crafted