A lot of decks have to play a big number of high-cost cards to see them as often as possible, subjecting your deck to possibly bricking, but with Luffy, you can tone down the amount of cards you play since you can search him with Nami or In Two Years
Let me know which mechanic you'd like to build an entire deck around on the next Mechanically Minded
The triggered ability goes on the stack before the spell resolves, and there is free timing before the spell resolves, so if you are triggering this with a combat trick that has an untap effect, don't forget to fire one off before the spell
With opponents fielding sizable blockers and cheap removal in short supply, Ragavan's ability to make an impact may be more Limited
Playing the Overlord on three will put you at four lands that turn, and if you have another land drop on your fourth turn, you can cast another Overlord for the full five mana, as a creature this time, while further ramping you to six lands