The aggressive pose, the storm of energy
In Magic there are lots of cards and lots of decks and therefore many things you need to be able to handle, the larger the format the more this is the case
Since you need to have exactly 100 cards in your deck and there is a relatively small list of banned cards (the Commander card pool includes almost all official sets), this kind of limitation is what makes the game more tactical
The best deck for value, for competitive EDH, and for fun
Popular side deck packages are the Artifacts (Artifact Sanctum, Artifact Scythe, Artifact Lancea) and Kaijus (Interrupted Kaiju Slumber, choice of Kaijus)
Put a piece of cardboard on the top and bottom of this stack to keep them from bending and use rubber bands to secure them together