"I must talk to the Morningstar"
Illustration from Paradise Lost
Public DomainIllustration from Paradise Lost - Credit: Gustave Dore

"Morningstar" is an English translation of the Latin word "Lucifer" (also translated "lightbringer"), which can refer to either the Morning Star (a misnomer for the planet Venus) or to the Biblical Satan, from an interpretation of Isaiah 14: 3-20. Dream is referring to Satan, whose full name appears to be "Lucifer Morningstar" in this issue.

Read Isaiah 14 at Bible.com.