A Rollercoaster of Prices
When Modern Horizons first got released, it quickly became clear that
The Deck
| Maindeck | ||
|---|---|---|
| 19Lands | 32Creatures | 9Other Spells |
| 1 | 4 | 4 |
| 2 | 2 | 2 |
| 3 | 4 | 3 |
| 1 | 4 | |
| 2 | 4 | |
| 1 | 2 | |
| 2 | 4 | |
| 3 | 4 | |
| 2 | 4 | |
| 2 | ||
| Sideboard | ||
|---|---|---|
| 2 | 2 | 2 |
| 1 | 3 | 2 |
| 2 | 1 | |
The deck can consistently put out the 8/8 Trample on turn two and even if it doesn't, there will usually be between one and three [Vengevines] attacking you. The ability to cast Hogaak from the graveyard makes it truly absurd since you don't even need to draw it, every card you mill gets you closer to the free 8/8 avatar. This means the deck needs few enough enablers that it can board in anti-hate cards post board to fight through

A Word on Main Deck Leyline of the Void
We have seen multiple decks at the Mythic Championship run
And this is important to keep in mind. Hogaak put up impressive win rates even through main deck hate, a feature you cannot expect from regular tournaments, so don't expect this deck to go anywhere soon. If you're playing Modern, you better have a plan for Hogaak in the long run, otherwise, you will do very little winning.
Financial Implications
When a deck is clearly placed in Tier 1 of a format, the demand for the cards will rise, everybody knows that. And when even the Pros could not find a good solution to Hogaak, there's a good chance this trend will continue. Speculating on Hogaak is still risky business though since Wizards might deem it too good for Modern once again, making use of the ban hammer twice in a row.
As for Leyline of the Void, it's a card that most likely won't fall out of favor too soon – it simply fulfills a very important role in Modern, Legacy, and Vintage sideboards and will continue to do so, even if Hogaak gets banned. Still, right now there is a lot of hype behind the card because people saw them in main decks, so either get them now or wait for them to come back down after a while. Don't make the mistake of thinking that Leyline will be played all over Modern's main decks though, that is simply wrong – especially in a format where players will stick to their pet decks, no matter how good the newest spice is.
