This deck subverts the Sandman archetype by including Junk archetypal elements. Instead of stacking your own Power wide, this deck uses cards like Aero and Magneto to cluster your opponent's Power together, and Annihilus as a quasi-wide Power play (junking up the opponent's side with only one card). An added benefit of this hybrid archetype is the ability to play Electro into Viper, leading to a unipartisan card play count limit. However, this deck can get by with typical Electro-Sandman or Electro-Ramp lines.
Always play Electro and Sandman at the same location. If Enchantress ever tries to disable Sandman, this will ensure that Electro is also disabled.
Try to play with the premise that you will lose the right location (due to The Void, which you may not be able to send over). Play Nebula here, so that the opponent will lean heavier into this spot- if you lose the spot, they will have overcommitted to it. If you are able to send The Void over, you can use Magneto or Aero to make room for it (you can also move The Void after it's been sent over with Magneto, which can win surprise cubes).
Watch out for Shang-Chi! He destroys Sentry and Magneto. Sandman or Electro-Viper can make Shang-Chi harder to play, but he is still always a massive flip.