Experiment by removing cards from the deck and adding in new ones from outside the original deck list
One, when Banewhip Punisher puts a -1/-1 counter on a creature, even if the Banewhip Punisher is destroyed before it can kill the creature, the affected creature still has its power and toughness lowered
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
The thing is, sacrificing your lands was no cost at all if it ended the game