Aquapolis and Skyridge gate Crystal Pokemon to specific card IDs at roughly 1%
Once you have a nice supply of 2-power creatures or tokens, its time to start copying powerful spells like Time Warp, Stock Up, spot removal spells, or even Cruel Ultimatum
The last Doctor card in the Blast from the Past set is The Eighth Doctor, a card that forces the player to mill three cards when it enters the battlefield, and then allows them to play a historic land or cast a historic permanent spell from their graveyard - whenever they use this ability, the chosen card is exiled when it leaves the battlefield
It can be a whole lot of fun for players who love having lots of huge, angry creatures with tramples
And yet if I were to include it as an Honorable Mention in a normal list, I would sell it, and you wouldn't even think twice
Their abilities don't dominate entire formats, and their restrictions are all fairly reasonable