Namis unique deck-out win condition made her one of the most infamous leaders in the game before she was banned from competitive play
Ichormoon Gauntlet not only lets every one of your planeswalkers proliferate, increasing everyones loyalty, it also gives counters when you cast any non-creature spells
The fact that Lumbering Falls has hexproof means that you can comfortably plan on it doing exactly what you need it to do, when you need it to do so

Rarity: C Cost: 1B Pow/Tgh: 2/1 // 5/6 Card Type: Creature - Rat // Creature - Eldrazi Horror Artist: Jason Felix Name: Graf Rats // Chittering Host Finish: Foil Card Number: 091/205 Set Name: Eldritch Moon Related Products Ulvenwald Observer - Intro Pack Promo Eldritch Moon - 13/14 NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock Long Road Home Eldritch Moon - 13/14 NM-Mint, English 3 In Stock NM-Mint, English 3 In Stock NM-Mint, English 3 In Stock Crop Sigil Eldritch Moon - 13/14 NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock Thermo-Alchemist Eldritch Moon - 13/14 NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock Backwoods Survivalists Eldritch Moon - 13/14 NM-Mint, English 8 In Stock NM-Mint, English 8 In Stock NM-Mint, English 8 In Stock Stromkirk Occultist Eldritch Moon - 13/14 NM-Mint, English 1 In Stock NM-Mint, English 1 In Stock NM-Mint, English 1 In Stock Wailing Ghoul - Foil Eldritch Moon - 13/14 NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock NM-Mint, English 2 In Stock Stromkirk Condemned Eldritch Moon - 13/14 NM-Mint, English 5 In Stock NM-Mint, English 5 In Stock NM-Mint, English 5 In Stock

The costs are even reasonable
But what do we look for