Abduction Points are the Overmind Player's version of the Hero Players's Experience Points. They are gained in various ways, and then 5 Abduction Points can be used to buy one Upgrade Node, which is the Overmind Player's version of the Hero Level Up ability.
Upgrade Node
Upgrade Nodes are tokens used to pay for Overmind Player upgrades to Alien Units, and the token is then placed on the Alien Upgrade Sheet to mark which upgrade it paid for.