The answer is: An idol

1 Samuel 19:13 - She placed an idol on his bed and covered it with goats hair and David's clothes

In this dramatic tale from 1 Samuel, Michal's clever act of placing an idol in David's bed showcases her loyalty and creativity while under tremendous pressure from her father, King Saul. The idol, along with goat's hair and David’s clothes, could easily have been a bold statement of their intimacy and partnership, but it also raises intriguing questions about the nature of their relationship and the era they lived in.

This incident adds a layer of tension to the narrative, as it directly reflects the possible geopolitical and familial discord in Israel at that time. It highlights a family's conflict not just with its own members but with larger forces, metaphorically dark and comedic as one prince dodges deadly ambition with a ruse so harmless at first glance. The use of an idol is significant too, as it implies the presence of domestic pagan traditions even amid the rising fervor for monotheistic worship, presenting a disconnect that echoes throughout Israel's history.

Interestingly, this feigned illness by David could also offer a fun parallel to several biblical motifs; one might recall how, at various times, a deceitful plot or clever ruse features prominently within the grander saga of inspiration. Additionally, comparisons to Abigail’s wise negotiation with David earlier—who was also processing another battle of wills—reflect that creativity is often just as crucial as bravery in the complex dynamics of ancient storytelling. Thus, Michal's quick thinking illuminates a tireless ally willing to rouse her intelligence in the face of potent nemesis.