Blue decks tend to be slow and patient, gradually building up card advantage and other resources until they're ready for the endgame, which is perfect for a midrange-oriented, moderately powerful format like Commander
The ones that were the most powerful back in the day, and so happen to be some of the rarest
Aside from providing consistent answers to defensive situations (where smaller Toxic setups might struggle), it can deftly switch between hitting opponents life and inflicting poison counters, as it was originally designed
Just be sure to protect those priceless Brainstorms in quality sleeves and deck boxes
Theres also a card divider matching the colour of your chosen deck box included too, which can be a pretty useful thing to have when organising your cards
No matter which two modes you choose, you always follow the instructions in the order they're written