Choose a commander you enjoy, define a clear strategy, add 7-10 win conditions, add the core components (draw, ramp, removal), build a 36-38 land mana base with color fixing, then playtest and tune the ratio
Grand Arbiter Augustin IV Here is a favorite of mine and one of the all-time popular commanders in Azorius, Grand Arbiter Augustin IV
The potential upside of trying to sculpt the perfect Grishnakh turn is far FAR outweighed by the penalty of not using your mana when it's available
Near Mint-Mint 8 : Light wear and slightly more noticeable flaws
Identifying a Cards Rarity Look at the expansion symbol on the right side of the card, near the illustration
All Treasure Making Discard to Draw Stuff There are a huge number of discard one, draw two, and then make Treasure tokens for future ramping and casting things that are great to add to your deck, especially in Highlander formats like Commander where you can run them all in the same deck