Yup, Tinker is far better than Reshape, and Reshape is easily our worst artifact Tutor, but alas, Tinker is banned. If it were legal however, I'd probably still run Reshape to have even more redundancy.

NeunviertelGood game vid. The quality was good and the banter, as noted in the Youtube comments, was great.

Grafdigger's Cage does say library, huh? Totally forgot about that clause. Yisan sucks so much more now with that card in play.

Looks amazing. I have most of these cards. Going to give it a try.

Thanks! I hope you'll have a great time with it.

Dumb question. How does timetwister/stroke of genius make a win?

Very good question, actually - we had that come up on the Teferi Discord a couple of days ago. There are two different ways, depending on whether you have access to the Chain Veil combo or not (I'll also talk to neo about including that explanation in the Primer somewhere):

1. With Chain Veil: You draw your whole deck, cast Stroke of Genius for at least x + 1, where x is the number of cards in their library, on one opponent to mill them out. Stroke hits the graveyard. Now, you cast Timetwister to shuffle it back into your library. After that, you +1 Teferi until you find Stroke again/have your whole deck in your hand, which lets you cast it again to mill our your second opponent. For your third opponent, you can flash it back with Snapcaster Mage to mill them out as well. If you somehow have more than three opponents, you can also use Time Spiral to get it back once, or you can flash back Timetwister with Snapcaster/JVP to shuffle it back once more.

2. Without Chain Veil: The way you do it is the same, but instead of using Teferi to draw your whole deck, you repeatedly use Sensei's Divining Top + Rings of Brighthearth to copy the Sensei's Divining Top draw. This lets you draw one card + Top itself, which means that you can replay top and keep drawing cards if you have infinite colourless Mana.

Two cards I would like to suggest.

The first is Padeem, Consul of Innovation. Both effects I have found to be amazing, but I particularly enjoy the draw. The hex proof has won me games. His mana cost is a little high however so I understand why maybe not an include, but hes also a good drop when you have a good mana hand but will run out of gas.

The second and better card in my opinion is Dimensional Infiltrator. He's an alternate win-con that with the right hand can win turn one or two. Hes very cheap and can be activated at instant speed so near uninterruptible, and you have everything else he needs already in deck. So a one card switch. Oh and he has flash!!!

Would enjoy your thoughts!

Padeem is a card I might consider running if I basically had to play Archenemy every game and people started packing a ton of artifact removal just for me. But in most competitive Metas, where decks are supposed to be on somewhat equal footing, our artifacts won't be interacted with enough to require giving them Hexproof. Another issue with Padeem is that the card draw he provides is incremental advantage, which is not something Teferi decks traditionally use. The only two pieces of incremental advantage we run are Sensei's Divining Top and JVP, with the latter also providing a lot of immediate advantage once he flips. Incremental advantages take several turns to really take effect, and that's not something we can afford to invest in, even if we drop him, say, Turn 2. Four Mana is a fairly big jump up from 3 Mana, which means that all of our spells that cost 4 Mana (or more) need to either provide us with a massive immediate advantage (think Memory Jar, Time Spiral) or win the game for us (Chain Veil, Tezzeret to tutor Chain Veil). Padeem does neither of those, unfortunately.

Dimensional Infiltrator is interesting, and I appreciate the creativity that goes into that choice. However, there are two reasons why we don't need it:

1. Diversifying win conditions is not something that Teferi needs to do.
2. Having Infiltrator as a wincon opens up a whole avenue of interaction for our opponents that they previously had no access to: creature removal. As stated in the Primer, creature removal is basically useless against us, but with Dimensional Infiltrator as a win condition, it suddenly becomes very good.

Neunviertel - I have a question of a different matter, among my decks the mono blue deck I've played with was high tide azami which I plan to change into Teferi, the build I'll start with is the exact same as yours because this primer is truly outstanding and I feel like it's the best way to go with Teferi. I own all but two cards from your list which are Tabernacle and Workshop. Which should be the first one I purchase? I feel like Workshop helps a lot with explosive openings but my meta is quite heavy on creatures (e.g. yisan, boonweaver karador, meren stax).on the other hand Workshop is quite cheaper :P. I'll probably get both of them but which one is more crucial for you?

The other thing is the issue of expedition map. Without tabernacle and workshop I feel like it's a free spot. What card you'd put in its place? I was thinking about either vedalken shackles or engulf the shore (because without tabernacle I lack mass removal).

If you really wanted to get one of the two, I'd say go for Tabernacle first. It's a card you're gonna want in many different competitive EDH decks, and one of our best pieces of creature hate. And yeah, you're spot on about Expedition Map - one piece of Tech I'm currently considering is Portcullis for more creature hate, but Engulf the Shore is also decent. Take that one if lots of creatures is your problem, and Shackles if you only need to deal with some key creatures.