Timestream Navigator and Time Sieve are just two that come to mind
if I had to pick one after playing the Bloomburrow Early Access event, Id say Manifold Mouse is the better Rare of the two
Most of this suite comes from the Invasion blockhaving not played during this time, I have no idea if this strategy had any place in the Standard or Extended metagames of the early 2000s
That said, its YouTube presence is still strong, with an average of 81k views from top-viewed videos this year
The lands entering tapped trigger is a weird riff on ones like the fastlands (ala Darkslick Shores) - tapping for colorless is a very good ability on lands like these, since it makes it so that the caster can use the land without having to dome themselves repeatedly
With Cultivate, you cast it, then follow the directions of the card