Take Sarevok's Tome, a middle-of-the-road mana rock that eventually starts casting spells for free
You can tap it to generate red mana for each goblin you control
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)
Even if we only have a 1/1 to sacrifice, it turns that 1/1 into a flying 1/1, as well as triggering any death triggers that our deck is bound to have
A Deck of Perfect Simplicity For Riders of Rohan , I never tried to use the deck with Eowyn, Shieldmaiden as the commander
Normally, those 1/1 Goblin tokens die immediately upon contact with almost any other creature, but Ib turns them into 4 damage on the spot