Also includes one foil stained-glass planeswalker:
[SLD:527] Angrath,
[SLD:521] Domri,
[SLD:535] Samut, or
[SLD:536] Vraska. All drops from the Dr. Lair's Secretorium Superdrop have a roughly 7% chance to have a Blueprint artifact card instead of their normal bonus card:
[SLD:603-607].