A Modern combo deck capable of explosive turn 2 wins via Hivemind, or Primeval Titan. But is also incredibly resilient against disruption and hate, and great at grinding out wins if it comes down to it.
The deck abuses the old Ravnica bounce lands, with Amulet of Vigor, which allows you to play a land, tap it for mana, and bounce it right back to your hand. Add Azusa, or Summer Bloom to the mix and you make crazy amounts of mana.
With all that mana you can either play Hivemind and win with a Pact, or play a Titan. Primeval Titan with Amulet can do some really broken things, and that's exactly what this deck is aiming to do.
To understand the deck, you first have to understand the interaction between Amulet of Vigor and the Bounce lands. With Amulet out, when a Bounce land comes into play 2 triggers go on the stack- An untap trigger and a bounce trigger. You get to arrange those however you want, and you want to arrange them: untap-->bounce. The untap trigger triggers and your land untaps. Now before the bounce trigger you can tap it for 2 mana, and then bounce it.
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Now the optimum line of play, is to play Amulet or search for an Amulet/ Bounce land T1. Then on T2 you can play an Amulet if you hadn't, or if you already have one in play, play your Bounce land, stack your triggers, untap, tap for mana, and bounce.
Now you can play Summer Bloom and do that 3 more times for 6 mana.
From here you can either play Hivemind and Pact for the win, or play a Primeval Titan. With an Amulet out you can do some really crazy things with the Titan land searching ability. There are a few different options you have:
Slayer's Stronghold + Boros Garrison
You're normally going to grab these off Titans first trigger. This is going to let you give Titan haste and attack for another search.
Tolaria West + Simic Growth Chamber
This is frequently grabbed so you can tutor up a Summoner's Pact and have another Titan ready, in case the first gets removed, or just to overload them on Titans. Against decks with Path to Exile, it's normally better to grab this, rather than Slayer's and Garrison off the first search, to play around their removal. You can also use this to tutor up a Slaughter/ Pact of Negation, or even Chalice, and Engineered Explosives.
Sunhome, Fortress of the Legion + Boros Garrison/ Vesuva
With 2 Amulets in play you can double pump a Titan with Slayers, then grab this and before damage can give Titan doublestrike for lethal. Outside the double Amulet brokeness though, this is still great at ending games. If Garrison is already in play you can grab Vesuva to copy it.
Kessig Wolf Run + Khalni Garden
This is great for overloading the opponent on threats. You can attack with Titan and the Token and wait for them to choose blockers and pump accordingly. This is also great in grindy games to give the opponent more things than they can deal with, and where you'll have the most mana for Kessig. Garden is great on its own also because it lets you play around Liliana and Edict effects, and also plays great with the Bounce lands.
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Now even if you don't get the Turn 2, this deck is still very fast and consistently gets out Titan or Hivemind Turn 3-4. And even if you don't have an Amulet you are still dangerous and explosive. We run 27-28 lands, and that means Summer Bloom and Azusa are crazy ramp even without Amulet. Turn 2 Summer Bloom, is still a Turn 3 Titan/ Hivemind even without the Amulet. Hivemind just wins you the game, but most decks in Modern can't handle a Turn 3-4 Titan, even when your not comboing with Amulet. Titans chaining into more Titans is nothing to scoff at.
The deck plays very well against most of the field of creature decks, midrange decks, and it also eats up control. The aggro decks don't have any relevant disruption, can't deal with Titan, and can rarely race you. The midrange decks aren't fast enough, and don't pack enough disruption. And the thing with control decks, is there's not a lot of relevant disruption against us. Even if all your Amulets and Summer blooms get countered, you just Transmute for Cavern of Souls and go ham chaining Titans.
All in all the deck is pretty difficult to learn, and is very unique, which makes seeing some of the unorthodox lines a little confusing at first. But once you understand the stack interactions, get used to finding the lines, and figuring out how to get maximum use out of your Titans, the deck starts to feel unstoppable.