Welcome to the Knight Garden!
This deck needs feedback for the Modern meta game. Mechanically, it's pretty sound. I'm not clear on exactly what to put in the sideboard, and there are some cards in the main deck that could be reduced / increased in number or substituted out entirely.
How the deck works
Philosophically, the deck is a toolbox of lands. The creatures all work well with lands, either having some kind of landfall ability, or in tutoring for them. It is a mid-range deck, which becomes lethal very quickly. It's not uncommon for the deck to do 20 damage in a single turn.
Creatures
Vinelasher Kudzu
,
Knight of the Reliquary
: both of these guys get bigger very quickly, and in response to blockers being declared.
Tarmogoyf
: Mostly, this guy draws fire, for all the right reasons.
Lotus Cobra
: Acceleration in the early game, powers
Chord of Calling
and
Kessig Wolf Run
in the mid-game.
Primeval Titan
: Used in several modes. Combined with Chord of Calling, he'll tutor for lands as you need them. Given the instant nature of the Chord, his arrival can also boost your Vinelashers. Finally, he makes a decent finisher on his own, or with a little help from Elspeth.
Avenger of Zendikar
: The neat thing about Avenger is that he boosts all plants on landfall, not just his own plants. This means that your Vinelashers get +2/+2 on each landfall. Also not too shabby on his own.
Land Toolbox
The fetchlands are best used in conjunction with the Knight of the Reliquary to either get a ton of mana with Lotus Cobra, boost your Vinelasher, or both. Added benefit for boosting the Knight and any 'goyfs you have out too!
Dryad Arbor
: Can be fetched with several different methods, and functions both critter and land depending on needs. Treetop Village falls into this category as well, to a certain extent.
Mosswort Bridge
: People forget about the exiled card and you can get a very neat boost from either dropping in another land (or if you're lucky a Titan) or slapping some removal at unexpected time.
Kessig Wolf Run
: Power-boosts are always nice, great and unexpected finisher as it can be brought in and activated during combat.
The rest are mana fixers -
Horizon Canopy
has the added benefit of the extra draw and putting a land in the graveyard for Knights and 'goyfs.
Spells
Elspeth, Knight-Errant
: Ah, Elspeth. Kind of self-explanatory.
Path to Exile
,
Lightning Helix
: Good removal of course, but Path can also be used on my own creatures (e.g. an Elspeth soldier) to tutor for a land in a pinch, and Helix helps regain some of the life lost due to cracking fetchlands.
Chord of Calling
: Obviously tutors, but at instant speed it helps with combat tricks too.
Explore
: Speeds the deck in the early game, allows for boosting those Vinelashers even more in the late game.