Sideboards are important in best-of-one (BO1) and best-of-three (BO3) formats, but mostly in BO3
Trading Card Games (TCGs) have seen an explosion in popularity recently, with the Pokmon TCG experiencing a rapid increase in collector interest thanks to content creators becoming enamored with rare card purchases and expensive box openings
Excava wants us to build in another way, and incorporate a lot of flicker to get rid of the finality counters and grow out creatures back to full size
The question remains, however, which MTG card is the most confusing ever printed
If you want to play an aggressive, counter-focused commander without going to Selesnya, this is an excellent choice
Just like other cheap cantrips like Opt or Consider, Brainstorm is worth playing in spell-based decks, but probably not in anything else