It stabilizes you by providing a massive blocker and tons of lifegain, it spews out an army of 3/3s, or it provides a source of card advantage
If you able to buy this deck for its original MSRP of $30 then youre looking at a 480% return on investment, which is great
For example, if you can chain together Beamtown Beatstick into Reyav, Master Smith , you'll generate a quick and powerful clock that's difficult to stop
Earthbend 3 allows you to transform one of your Land cards into a 3/3 creature with haste, meaning it can be used to swing at opponents immediately
Given that nearly all of the value in MTG lies in rares and mythic rares, it means that Double Masters packs are technically worth more than normal, which is nice - but that worth should be for the players alone and not for Wizards of the Coast