Justice League Dark Collections Guide

Madam Xandau's Cards of Fortune Collection
Grants you: 5x Source Marks
Grants you the feat: Stacking the Deck (3 star feat, plus "The Mystic" title)
Drops in Duo, Alert and Raids (Bosses) and also JLD lootboxes.

1. The Death Card
2. The Magician Card
3. The Judgement card
4. The Fool Card
5. The Hanged Card
6. The Sickness Card
7. The Tower Card
8. The Moon Card
9. The Sun Card
10. The World Card
11. The Hermit Card
12. The Chariot card

Justice League Trading Cards Collection
Grants you: Cloak of Nabu's chosen
It is a open world collection, you need to collect 18 of those.

1. John Constantine
2. Zatanna
3. Deadman
4. Madam Xandau
5. Shade the changing man
6. Enchantress
7. Swamp Thing
8. Detective Chimp
9. Wonder Woman
10. Man-bat
11. Etrigan
12. Black Orchid
13. Andrew Bennett
14. Mindwarp
15. June Moone
16. Frankenstein
17. Doctor Mist
18. Pandora