Below is the unofficial checklist for Series 13. The ones in bold are the ones I have.

Abomination (with Incredible Hulk vol. 2 #25 and left arm of Onslaught)

Abomination (melted face, chase)

Blackheart (includes Wolverine/Ghost Rider/Punisher: Hearts of Darkness and left leg of Onslaught)

Green Goblin (with Amazing Spider-Man #122 and right leg of Onslaught)

Green Goblin (Maskless, Chase)

Lady Deathstrike (includes Wolverine #77 and upper torso of Onslaught)

Loki (includes Journey Into Mystery #116 and right arm of Onslaught)

Loki (alternate head, Chase)

Onslaught (the Build-a-Figure)

Pyro (includes Daredevil vol. 1 #355 and lower torso of Onslaught)