In Vintage, where Wasteland is legal but the Moxes make it less defining than it is in Legacy, Wrenn and Six isnt the strongest planeswalker, and I think that honor either goes to Karn, the Great Creator
The cost reduction for artifacts and creatures sacrificed earlier in the turn will apply even if you don't sacrifice any as an additional cost
Hand of Death tries to resolve, but the card it targeted is no longer on the battlefield, and does not exist to be targeted
With 300 HP and the ability to deal 1,000 damage with a single strike, Shadow Lugia is ridiculously powerful
Teferi, Timebender Teferi, Timebender was designed as an Intro Deck planeswalker, and these are usually not good enough for the Standard format
A one-mana commander is hard to hate, and maybe you can make this into some 'live fast, die fast' kind of deck, that wants to burn through its life total as quickly as possible - very on theme