LOTR: Could Wormtongue Have Succeeded In His Desire To Own Eowyn?

gamerant.com:

If there are two things that fans of the Lord of the Rings know about Grima Wormtongue, it's that he is willing to betray anyone and everyone to get what he wants, and that he gets very vengeful when he is backed into a corner. When the audience first meets this slimy character, he has all the airs and graces of a noble man of Rohan, portraying himself to those around him as a trusted and loyal advisor to the king: “I only wish to serve you my lord.”

But when the 4 members of the fellowship arrive to find out why Theoden king hasn’t made a stand against the growing number of orcs raiding and burning through Rohan's villages, they soon discover that Grima is not all he seems. Gandalf is able to spot a worm a mile away, and very quickly realizes that Wormtongue isn’t the only cunning and twisted mastermind between Theoden's debilitation, but that the white wizard Saruman is also working behind the scenes. Gandalf is thus able to banish the wizard from Theoden’s thoughts and expose Wormtongue as the traitorous wretch he is. But what would have happened if Gimli, Legolas, Gandalf, and Aragorn had never arrived in Rohan?

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For a start, it is highly likely that the War of the Ring would have turned out very differently. Without Theoden leading at the Battle of Helm’s Deep, they never would have been able to wipe out a good portion of the orcs from Saruman’s army. Without Theoden charging to Gondor’s aid, the city of Minas Tirith would have been over-run and countless lives lost. And without Theoden in the battle of Pelennor fields, Eowyn never would have been there to rescue her uncle, and wouldn’t have killed the Fell Beast and the Witch-King of Angmar, who is Sauron’s right-hand man.

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