Search your library for a card that shares a color with a legendary creature you control, reveal it, put it into your hand, then shuffle
Since it's uncommon, you might be able to draft a second copy, which would be unbeatable
Now, let's say there is a single copy of Legends Greed on TCGplayer listed for $300 by someone who didn't especially want to sell the card (or is hoping someone is ignorant enough to buy it for way more than its market price)
You can tap it to generate red mana for each goblin you control
For one life and a sacrifice, you draw a card and place a -1/-1 counter anywhere
A Deck of Perfect Simplicity For Riders of Rohan , I never tried to use the deck with Eowyn, Shieldmaiden as the commander