A deck idea I had for a more competitive Selesnya aggro deck. Backbones of the deck are Fleecemane Lion and Eidolon of Countless Battles. Fleecemane acts as a beastly 2-drop, coming in at 3/3 for a base, which will have to be answered quickly before he becomes monstrous, packing his glorious locks, Indestructible, and Hexproof to boot. Eidolon sets up well for mid-game as either a creature, or for beefing up Fleecemane, as well as any of the other creatures in the deck.
Additionally, I added Karametra, God of Harvests and Nylea, God of the Hunt. Karametra for her land-searching ability, which can be utilized well, due to all the low cmc creatures, and Nylea for her ability of granting Trample to all creatures.
Providing support for Eidolon of Countless Battles is Hero of Iroas. Hero lowers Eidolon's CMC for his bestow cost, and makes him even more viable early-game, if he hits the field, in addition to lowering the Bestow cost of the other enchantment creatures, and auras of the deck.
Leafcrown Dryad adds a viable 2-drop 2/2, devotion to green/white, and adds support for reach to creatures bestowed with it. In the same sense, Nyxborn Shieldmate adds a 1-drop to take the field early, that will survive most turn 2-3 creatures, and has a reasonable bestow cost. Both of them are lowered while Hero of Iroas is active.
Lastly, I wanted to add Archetype of Courage to give all of my creatures First Strike. Preventing the opponent from using First Strike creatures, and making the early-mid game creatures bigger threats is always a welcome bonus.
For Auras, I'm running Unflinching Courage, mostly to add to Fleecemane Lion or Eidolon of Countless Battles, making them serious threats, even early-game. If a Fleecemane can stay on the field until becoming monstrous, placing Unflinching Courage on it and making it a 6/6 Indestructible, Hexproof, Lifelink, Trample behemoth.
Alpha Authority granting Hexproof early to Fleecemane, or even Eidolon of Countless Battles can keep the most-needed creatures on the field until they achieve maximum effectiveness. As well as stacking with Unflinching Courage to make Trample all the more effective.
Ordeal of Nylea makes for a nice boost to any creature, temporarily increasing devotion, and ultimately searching for two lands once they've outlived their usefulness. It also plays well off of Karametra's theme of landfall.
Lastly, Ethereal Armor gives a serious buff to not just every creature, granting a default +1/+1 and First Strike for one white mana, but it is tremendously useful on Eidolon of Countless Battles, stacking nicely with his own ability.
