The thing is, sacrificing your lands was no cost at all if it ended the game
Note that while I have good options in Dreadmaw's Ire and Sunfire Torch, its hard to pass this (its not the absolute bomb in this deck, but still pretty good)
That said, its also often fine to just use Brainstorm as a cantrip if you have to I feel like some people swing too far in the other direction and refuse to cast it unless theyre getting a lot of value, but the beauty of the card is that it can be cast in many different ways, so you should not impose this restriction on yourself
Despite having a similar theme that screams synergy at first glance, a deck helmed by Archelos, Lagoon Mystic probably isn't the best home for Back to Basics because of the demanding color identity that will likely see you running a high number of nonbasic lands
Sardelis says the deck will appeal to anyone who wants to "make a baby version of an Inferno Titan." The deck also has a small power one theme, to go with its commander's ability