Cards like The Queen, Commanding Presence and Gaston, Intellectual Powerhouse are about as tricky as things get, but they simply do what they say on the card and get players used to the powerful (at least in my eyes) shift mechanic, which is a cost reduction method
Sven Stolz Crashing Footfalls, the card with its own shell around, has been heavily buffed since the printing of Shardless Agent
It really speeds up your stuff and is massive ramp that gets better the longer you drop it, but just four or five on turn 2 or 3 when you drop it is still pretty good
They are about as far from the natural approach as possible
Clock of Omens
Only 19 cards are tagged on Scryfall with unstoppable, the most recent of which are Zilortha, Apex of Ikoria and Imaryll, Elfhame Elite