That does not mean, as we have explained before, that the metagame is static, but if you invested in Regidrago when it first came out (like 4 or 5 years ago), you would have had in your position a tier 1 or 1.5 deck ever since
You want to go second when playing this build because you want to attack with Roaring Moon ex or the baby Roaring Moon on your first turn
This is a fixed take on Tinker, which sacrificed an artifact and then searched your library for any size dork and arrived to the battlefield without any additional cost for 3 mana
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Fun fact: Conkeldurrs pillars are said to be carved from the very foundations of mountains, showcasing its incredible endurance
Certainly viable in mono color and colorless decks, at any rate