Amalgam, as the name suggests, is a combination of multiple humanoid DNA, merged into a single body with multiple hands, legs, innards spiraling out, and a belly mouth that is hungry for fresh human flesh.
The go-to attack pattern of Amalgams is to absorb their victims and in some cases other Zombies by extending a cluster of limbs into a tendril that pulls the target into their chest cavity, which functions like a gaping maw.
When an Amalgam is killed, it will lose all of the body parts instantly, exploding into a gruesome spray of blood, and internal organs.