Everything in the Peer Through Time Commander deck: all 100 cards with current prices, what the deck is worth against the sealed price, the 15 new cards, and whether it is worth buying.
+1: Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library. −1: Untap up to four target permanents. −10: You get an emblem with "You may activate loyalty abilities of planeswalkers you control on any player's turn any time you could cast an instant." Teferi, Temporal Archmage can be your commander.
Like the others, Peer Through Time needs some focusing. I’d start by deciding how you want to generate advantage and stick to it. Stitcher Geralf wants to play completely differently from Teferi, Temporal Archmage and Lorthos, the Tidemaker. Slim the deck down to focus on milling cards, controlling the board with planeswalkers, or generating huge mana to activate Lorthos’ ability.
Peer Through Time is the 2014 mono-blue deck featuring Teferi, Temporal Archmage as it’s face commander with Stitcher Geralf and Lorthos, the Tidemaker as the alternate commanders.
Teferi, Temporal Archmage was the first time we saw the ability to activate your planeswalkers’ loyalty abilities during your opponents’ turn. Even if it’s a -10 ultimate, it made a huge splash when it was spoiled. Since each of your opponents’ turns counts as a new turn you could activate an ability up to three times before your next untap step!
Despite this, the blue precon feels even less focused than the others. It has a draw subtheme and a cloning subtheme, but I wouldn’t go so far as to say it’s optimized in either direction. It runs a few board wipes including Nevinyrral's Disk, but it doesn’t seem to have an endgame besides to tick up Teferi and cast a big creature like Deep-Sea Kraken, Sphinx of Magosi, or the previously mentioned Lorthos, the Tidemaker.