Final answer:
The details in the question's context do not include opposing captains desiring to take Magellan under specific conditions, but rather detail the strategic alliance and subsequent betrayal by Rajah Humabon that led to Magellan's demise.
Step-by-step explanation:
The student's question pertains to historical events related to the voyage of Portuguese explorer Ferdinand Magellan, who was under the employ of Spain. Despite the mention of opposing captains in the question, the provided excerpts do not specify an instance where opposing captains wanted to take Magellan under specific conditions. However, it is mentioned that Rajah Humabon of Cebu desired Magellan's assistance against Lapulapu, under the condition of converting to Christianity. This alliance led to the Battle of Mactan, where Magellan was killed. The remnants of Magellan's expedition encountered further trouble when Humabon attacked them, after which they fled to the Moluccas before eventually returning to Spain with only eighteen survivors from the original crew.