This doesnt only include the core design of the card, but also new mechanics that can change how cards have traditionally looked (Planeswalkers, DFC, and meld for examples), new card/frame layouts, and special treatments
Basic Value Equation: Worth Grading: Raw card value (cost of raw card + grading fees (mentally include turnaround times and changes in the market during that time) graded value of the card (include worst case scenario grade up to best case scenario grade) Only worth grading if this card is meaningful to you, meant to be part of your personal collection, or you're concerned with preservation or authentication
In addition to the Grindstones and Lions Eye Diamond core to the deck, Adams had access to Senseis Divining Top, Pyrite Spellbomb, Aether Spellbomb, Engineered Explosives, Ancient Den, Tormods Crypt, and Pithing Needle, when the occasion called for it
Valakut Invoker and Secret Door can just end the game on the spot, and Third Path Savant can draw you cards until you hit one of those
Lightning Bolt is perhaps the most striking inclusion due to its mix of history - it has been present in Magic: The Gathering since the game's very first set - and tournament viability, where it regularly features into decks in each format it is legal in