Convergence of Cyriss is a small cult of humans who worship Cyriss, the clockwork goddess of logic and mathematics who lives in one of the moons. (Or maybe she is the moon?) The Convergence are by far the most technologically advanced of the human factions - although they can't really be counted as human anymore given that most members have had their souls magically encapsuled in mechanical bodies called clockwork vessels.

There are three things that set Convergence warjacks (Vectors) apart from normal warjacks:

They don't have a Cortex, and don't get a free focus from Power Up.
Instead they have an Induction Node which lets the Convergence player reuse the same focus over and over again on multiple Vectors - but only if the Vectors position themselves in harmony.
The Vectors don't have their own MAT/RAT stat. Instead the Vector's MAT/RAT stat is always equal to their controller's stat.

Starter Sets

2017 Army Box (limited availability)

Contents: Iron Mother Directrix warcaster, a Corollary light vector, a Mitigator light vector, a Monitor heavy vector, an Assimilator heavy vector, a Modulator heavy vector, a 5-man unit of Reciprocators, and a 3-man unit of Optifex Directive

As of March 2019, this is still in stock at Privateer Press' website.

Mk2 Battlegroup Set (limited availability)

Contents: Forge Master Syntherion warcaster, a Mitigator light vector, a Galvanizer light vector, and a Cipher heavy vector.

You may not be able to find this any more, as it has gone out of production.