Just a super solid card that will see a lot of play
In a Synchron Deck, you can take a Scrap Synchron and immediately connect it to the summoning of a Scrap Warrior
Gunkan Suship Ikura-class Dreadnought, on the other hand, is perfect for aggressive plays and combos amazingly with Piercing the Darkness, which can give massive ATK buffs and is made even better by the fact that Gunkan Suship Ikura-class Dreadnought can attack twice, as well as pop an opponent's card when it deals damage
Necropotence gives you a great devils bargain: dump in a bunch of life, draw 20-35 cards in your end step, and hope to untap so you can win the game
The same can be said for Walking Ballista
While it doesnt exactly fit in a list of the best dual lands in MTG , which are quite the hit these days, Id say its just as vital for fast starts and is so strong that its still ranked among the top utility lands in Commander, shortlists of the best colorless cards MTG collectors should get, and competitive formats to this day