4x Aleud Beastmaster
4x Duskwood Vanguard
2x Red Silk Dancer
4x Surging Kalak
4x Ranger's Guile
4x Fierce Instinct
4x Brute Force
3x Infuse Vitality
4x Roggar's Frenzy
4x Flourishing Crevasse
4x Wayfarer's Shrine
3x Guardian's Resolve
4x Tenacious Guide
2x Weapon Smash
3x Echoing Sunder
3x Flex (Red Silk Dancer, Guardian's Resolve, Brothers in Arms, Technique of Hao'Tai)
Problem, officer? RG Infect aka Feed the Troll is a deck that tries to race the slower and grindier decks of the format by unloading enough power to potentially win the game on turn three. The key point of the deck is Duskwood Vanguard, an unassuming 0/1 Elf which on a perfect hand can swing for 12 on T2 or 18 on T3 thanks to Wayfarer's Shrine and Groundswell.
Your mission is simple, land a creature as soon as possible, aim it at the opponent, then fill it full of pump spells and Kalak triggers until they stop twitching.
Most decks object this this though, so we've got some extra firepower for them:
Ranger's Guile and Guardian's Resolve shutdown all those pesky removal spells, with Ranger's Guile giving them an extra damage (or four) for their trouble, and Guardian's Resolve letting us scry and weather wraths.
Roggar's Frenzy is enough of a reason to splash red, letting us punch extra damage, kill Clutch of the Coil, churn out tokens for any late games we find ourselves in, and just generally being a card you're happy to draw at any point in the game. Style points for using it to Frenzy your own Surging Kalak.
Red Silk Dancer and Technique of Hao'Tai are our best options for tokens, making sure all those pesky things to run underfoot while providing a body or a crazy Kalak trigger spell in other matches.
Tenacious Guide stops counterspells. Eats a lot of removal though.
Weapon Smash and Echoing Sunder are our main weapons against artifact and enchantment based decks that prevent us from winning early.
Brothers in Arms is just hilarious with Surging Kalak. This is mostly a fun-of card but is good for busting creature stalemates such as buttfighting.
Room for Improvement
The deck really wants a Gladecover Scout or a sturdy flier, and I'm really considering Swiftfoot Elk and even Winged Envoy for the slot, which would unfortunately means losing Roggar's or splashing two colors, although Duskwood Vanguard would love the fetches.
On the flip side, Brute Force is fairly inefficient, and Giant Growth would be better here if we get it.
And while the inspiration for the deck, Surging Kalak is really not pulling its weight. Dropping it and some lands for some more 1 and 2 drop creatures, perhaps Interan Soothsayer, may prove the better strategy for quick, decisive wins.