It's about shuffling up your strong and fully optimized deck, whatever it may be, and seeing how it fares
You need to have Energy in your hand to use Welder, so grab it from your deck with Fiery Flint, or from your discard pile with Fire Crystal
Here, beneath a layer of humor, Commanders Herald pointed out how MTGs art doesnt always match the card
Heritage Auctions: All Heritage sales (ha.com) are archived with photos, detailed descriptions and final prices
With Leaf Wallop, you can 1HKO Tynamos (found in Zekeels variants, and potentially future Rayquaza EX variants as well), crippling your opponents early set up as well as buying yourself time to set up your Hydreigon and attach energies
For a Standard or Modern aficionado, the underlying story can simply be their quest to improve and win events