Gholdengo EX's attack does 50 damage times the amount of energy you discard from your hand, so if you use Energy Search Pro, you will instantly have 350 damage available from one item, which does not feel fair
These cards have been a hot commodity for over 30 years
Awaken The Woods has tons of potential in other formats like Commander, especially with cards like Tatyova, Benthic Druid who allows you to draw a card when a land enters the battlefield.
Card Text 2 [Security Effect] [Security] You may play 1 [Takuya Kanbara] from your hand or trash without paying its memory cost
Your graveyard gets filled RIDICULOUSLY fast
Here are a handful of inexpensive equipment with triggered abilities that will help the deck function: Explorer's Scope, Goldvein Pick, Greatsword of Tyr, Rogue's Gloves and Quietus Spike