Our three planeswalkers seeks out to bust the myth that Myth Realized isn’t playable in modern.
Teferi, Time Raveler (now T3feri) costs three mana and starts at five loyalty. These are good rates in modern in terms of staying-power. If you're playing him on curve and uptick, most deck's in the format won't be able to kill him easily—and those who do; that's five or more damage not going to your face turn three.
Each opponent can cast spells only any time they could cast a sorcery.
When they revealed T3feri I was immediately excited. If you've followed this list for a while, you probably recall that Liliana of the Veil was included to facilitate Myth Realized (much like Tarmogoyf in Jund). With his passive T3feri is way more efficient in this role than LotV. Forcing the opponent to play at sorcery speed naturally protects the monk avatar from removal when realized on our turn. Most importantly, we no longer need to discard cards form our hand (Myth is a card that cares about spell density).
[+1]: Until your next turn, you may cast sorcery spells as though they had flash.
Being a spells-matter deck, Mythbuster naturally incorporate tons of powerful spells. Instant speed sweepers are almost legacy power-level, and draw-step Day's Undoing is what dreams are made of. Admittedly, the plus doesn't do much on its own, and some deck's will capitalize on that fact—in which case you probably side him out.
[-3]: Return up to one target artifact, creature, or enchantment to its owner's hand. Draw a card.
Now remember, the minus-ability is un-interactable thanks to his static ability. It's important to realize that the ability doesn’t require a target for you to draw a card, and that you can target artifacts and enhancements as well. This means that you can bounce a Chalice/Blood Moon/Bridge/Choke and take it with a piece of interaction to release the lock.
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While primarily a combo piece in this deck, Narset also works surprisingly well as a hatebear. Most decks in modern draws extra cards in some shape or form, and simply having Narset on the field can be a huge burden for the opponent. Also, digging four-deep makes finding the Undoing-combo or relevant interaction quite consistent.
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There’s no denying that Jace TMS is great—he’s even a threat himself (and key to beat infinite life). Since the deck runs the full playset of Narset, T3feri, Myth Realized and Day’s Undoing there’s a decent risk of having multiple copies in hand. Therefore, brainstorming excessive copies away is a huge boon.
In some cases, you get to have all three mythbusters on the field, and in these scenarios, I would say; “Myth busted”.