4 cards where the set is “sld” and (the collector number = 506 or the collector number = 524 or the collector number = 525 or the collector number = 528)

Ashiok, Dream Render (Secret Lair Drop #528)
Jace, Wielder of Mysteries (Secret Lair Drop #506)
Sorin, Vengeful Bloodlord (Secret Lair Drop #524)
Tamiyo, Collector of Tales (Secret Lair Drop #525)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.