The cover card of this deck is Thunderbreak Regent, a Dragon from Dragons of Tarkir that has attracted a great deal of hype. First of all, being a Red Dragon has driven up his price due to casual appeal. But he's a pretty solid creature for Standard, as well. The Regent is a 4/4 flyer for 2RR (2 colorless, 2 Red) that deals 3 damage to any player that targets it or another Dragon with a spell or ability an opponent controls.
The Regent is therefore a bit tricky to remove. It's obviously best used in a Dragon-centered deck. With the various Dragonlords from Dragons of Tarkir seeing play, it's not hard to see Regent seeing a good amount of play for the foreseeable future.
Let's take a look at the deck list:
4 Elvish Mystic
4 Heir of the Wilds
4 Fanatic of Xenagos
2 Golden Hind
2 Mogis's Warhound
1 Yasova Dragonclaw
1 Boon Satyr
1 Savage Knuckleblade
1 Polis Crusher
1 Mistcutter Hydra
1 Surrak, the Hunt Caller
1 Thunderbreak Regent
Non-Creature Spells (12)
2 Wild Slash
2 Lightning Strike
2 Temur Charm
1 Arc Lightning
1 Crater's Claws
1 Stubborn Denial
1 Outpost Siege
4 Evolving Wilds
4 Frontier Bivouac
1 Temple of Abandon
2 Arc Lightning
2 Rending Volley
2 Disdainful Stroke
2 Encase in Ice
2 Abzan Beastmaster
2 Reclamation Sage
2 Act of Treason
1 Stubborn Denial
The two "chase" rares in the deck are the aforementioned Thunderbreak Regent and Outpost Siege, the latter of which has seen tons of Standard play. Most of the time you'd use the Khans ability for some pseudo-card draw. But the Dragons ability is pretty good if you're playing a more creature-based deck. It's a strong card that many Red Deck Wins variants have used.
While many of the other rares in the deck aren't currently worth a ton of money, there are tons of playable cards. Boon Satyr, Mistcutter Hydra, and Polis Crusher are all from Theros and rotated out of the Standard format in October 2015. The Hydra continues to see play in sideboards in Modern and Legacy, due to its protection from blue. The Satyr has seen plenty of play in the past, mostly in mono-Green Devotion, but other cards have pushed it out of those decks. Polis Crusher is really only useful against Enchantments, but is excellent in the right match-up (for example, taking out an opposing Courser of Kruphix.)
Crater's Claws is a X burn spell that has being seeing a lot of Constructed play. With the amount of mana ramp available in this deck, between the 4 Elvish Mystics and 2 Golden Hinds, it's possible to burn a player for a great amount of damage. There are also a ton of creatures with power 4 or more in the deck, so the additional 2 damage that the card's Ferocious effect provides should happen more often than not.
Surrak, the Hunt Caller is a 5/4 Human Warrior for 2GG (2 colorless, 2 Green) with a Formidable ability that gives a creature Haste during each combat phase on your turn. Gathering the 8 necessary power to activate this ability is fairly easy with this deck, especially with his own 5 power, so he can often give himself haste. Another cool thing about his ability is that you can play your "mana dorks" such as the Mystic and Golden Hind in your first main phase, give them haste during combat, and tap them for mana during your second main phase. He's solid as a one-of, especially in this deck.
Heir of the Wilds is very often going to be a 3/3 when it attacks due to all of the creatures in this deck that are either power 4 on their own or can be with their effects (like the Fanatic.) Also, having Deathtouch means that larger creatures may not want to block it. The Heirs and the Fanatics work well together as a team.
The 2 copies of Mogis's Warhound are basically in the deck to help guarantee Ferocious by giving another creature +2/+2 when it's Bestowed. You'll rarely play him as a 2/2 for 1R who must attack every turn if able. When you go about improving the deck, these are probably the first two creatures to go, probably in place of 2 more copies of Savage Knuckleblade.
Besides Craters' Claws and Outpost Siege, the non-creature spell lineup is headlined by Wild Slash from Fate Reforged and Roast from Dragons of Tarkir. While Wild Slash doesn't look exciting, it's a Shock that can stop damage from being prevented; it has been seeing plenty of Standard play. Roast can deal with big creatures such as Siege Rhino, which is one of this deck's worst nightmares as a 4/5 wall. It's even become quite a popular removal card in Modern.
The other non-creature spells are 2 Lightning Strike, 2 Temur Charm, 1 Stubborn Denial, and 1 Arc Lightning. It's just enough burn to deal with most chump blockers and the last points of damage. If you find you need more, there's plenty to turn to in the sideboard. There are 2 more Arc Lightnings and 2 Disdainful Stroke for additional counter-magic. Also, you have 2 Rending Volleys to deal with specifically white and blue creatures and 2 Encase in Ice to deal with red and green creatures.
Two copies of Reclamation Sage help with artifact and enchantment removal if you need it. Two of Act of Treason help you deal with stealing big creatures from your opponent to guarantee swinging in for major damage. Lastly, there are 2 copies of Abzan Beastmaster if you feel you need extra draw power.
The mana base is fairly solid, as well, with 4 copies of Frontier Bivouac to provide all three colors of mana for the deck. It would be better with 4 copies of a fetchland like Wooded Foothills instead of the much slower Evolving Wilds.
Improving the Deck & Conclusions
Landslide Charge is a pretty decent start to a Temur (red/green/blue) deck, although it does have a lot of Theros block cards like Fanatic of Xenagos in it. But this deck could be improved fairly quickly. My first inclination would be to remove the 2 Mogis's Warhound for 2 more Savage Knuckleblade (as mentioned early), and moving the Polis Crusher to the sideboard for a 4th copy of the Knuckleblade. The Mistcutter Hydra is probably better off in the sideboard, as well. Ashcloud Phoenix would be a better option for this deck. Another creature to consider would be Rattleclaw Mystics in place of the Golden Hinds for more consistent mana ramp.
Overall, Landslide Charge is a pretty good Event Deck, and as it's one that is typically selling for under retail, not a bad investment if you plan to play in your local Friday Night Magic and need a deck that just needs a few tune-ups to be fun to play while also being reasonably competitive.