"We also ask that you refrain from any nuisance behavior, such as improper handling of purchased food, excessive demands on staff, or unauthorized photography inside the store." Fair game
Ok, that is pretty decent in certain aggressive decks (though life gain is a little less relevant in formats where you start with 40 rather than 20)
This saw a bit of time in the red Standard decks of the day, although it fell off as Standard got more powerful
A two-mana flying lifelinker that can disrupt your opponent's hand by stealing a card, Deep-Cavern Bat has seen plenty of play ever since it was released in last winter's MTG set Lost Caverns of Ixalan
Once youve got Opts to help fix your mana, there is the question of whether you can afford to be greedy and replace some of the Essence Scatters with Essence Captures, as we see from Liam Carlton: Creatures (19) Lands (24) Spells (17) Sideboard My first inclination is that this is too greedy for too little payoff, but if its wrong, it might not be wrong by much