Rule number one: save your fetchlands. They give you mana off of cobra, trigger khalni heart expedition an extra time, and can grab lands situationally if you topdeck something and don’t have the right mana to play it. Always lead with basics and shocks, even if they are mountains, unless you need to get a forest for your turn two play. Turn two ideally you should be playing either
Lotus Cobra
or
Khalni Heart Expedition
in order to set up for your turn three megaramping. This is all assuming that they don’t kill cobra. The reasoning is that they won’t think that cobra is part of a combo. Modern players are trained to kill
Birds of Paradise
and
Noble Hierarch
on sight, but when they see a lotus cobra, they will just wait for a bigger threat to come along. They won’t waste a three damage bolt or a path to exile on something with one measly health. Anyway, your ideal turn three would look like this. You already have cobra down. Before playing any lands, you play khalni heart expedition. Now you play and crack a fetch, going for an untapped land, then tapping it. With cobra, you should now have three mana. With this mana, play
Harrow
,
Explore
, or
Growth Spiral
into another land, which will trigger khalni heart expedition. You should have six lands and three or four floating mana, which you can use to ramp some more. You should end the turn with seven or eight lands. At this point, it’s good late for them to kill cobra, because you already have your lands. Now let’s go through that scenario again without cobra. Let’s say you start turn three out with a khalni heart on the field already. Depending on their deck, you can go for the turn five kill instead. For the turn four, you would just do the same thing as before, but you won’t have as much floating mana, so you will end with max seven lands. If you want to go for the turn five kill, you would play another khalni heart expedition, then play and crack a fetchland, getting two counters on both of them, setting up for megaramping on turn four.
At some point in the first few turns you want to find
Sacred Foundry
so you can cast BTL on four if you need to.