Kirol, History Buff Kirol, History Buffs prepared spell certainly packs its punch, as two counters can swing combat heavily in your favor
Theres of course the new alternate art Garruk, Cursed Huntsman, but the hits keep on coming
Compared with most modern expansions, Obsidian Flames remains relatively inexpensive
Because you're focused on developing a one threat at any time, however, you're particularly vulnerable to targeted removal such as Swords to Plowshares, which can undo all the work you've done for 1 mana at instant speed
The Mako is particularly aggressive
Creatures (28) 1 Llanowar Elves 1 Solemn Simulacrum 4 Birds of Paradise 1 Acidic Slime 1 Inferno Titan 1 Wurmcoil Engine 1 Viridian Emissary 1 Elesh Norn, Grand Cenobite 4 Blade Splicer 1 Fiend Hunter 3 Avacyn's Pilgrim 1 Geist-Honored Monk 4 Strangleroot Geist 4 Huntmaster of the Fells Lands (24) Spells (8) Phyrexian Mana was not a good look