It makes sense, then, that our first card on this list is one that costs two blue and one black to cast: Undermine
And that combination with magic really is what exemplifies, to me, the fantasy portion of it. To exemplify the sci-fi vs
Its slow, but left unchecked it becomes massive
It also makes the value from creatures with abilities more secure since youre not relying on hope and counterspells to untap with them
Timetwister has appeared as a one-of in basically every Vintage archetype at some point or another, even if it has also been famously cut from basically every archetype at one point or another (at least temporarily)
There are plenty of ways to double up on your instant and sorcery spellsmost notably Zada, Hedron Grinder, a commander who makes dozens of unplayable cards suddenly very strong