Modern Burning-Tree Zoo
Currently the 2 flex spots are the Reckless Bushwhacker. I am trying this card out. I took out 2 Become Immense to add the Bushwhackers. The dream with the Bushwhakers is to cast them on turn 2 off of a Burning-Tree Emissary and trigger the surge bonus.
Sideboard
Volcanic Fallout - This is for tokens, affinity, and any deck that tries to go wide or provide a bunch of blockers. My creatures are always 3 toughness, so I am usually clear.
Stony Silence - Affinity, Tron, and Lantern.
Molten Rain - Tron. Running only 18 lands means casting Crumble to Dust just isn't going to happen. The goal is to disrupt them by a turn or two to get my creatures through.
Shattering Spree - Affinity.
Gruul Charm - Lingering Souls tokens or as a falter effect to get my creatures through.
Kor Firewalker - Burn. I get triggers off of their spells and most of mine. This is my life gain since I do a bunch of damage to myself with my lands.
Plains - This is for when I bring in the Firewalkers and don't want to take 6 damage fetching for double white sources.
Rest in Peace - Living End, Goryos', Protean Hulk, Podless Pod, any other weirdo graveyard deck.
Destructive Revelry - Affinity and Boggles. Blow up their stuff and do some damage.