You could hit some hugely impactful spells, like Dream Harvest or Mirrorform
Usually he doesn't stay on the board for very long but again, forcing the opponent to use removal on a card that doesn't impact the focus of the deck is always a good thing and they have to do it on their turn (bonus) Soulfire Grand Master - A 2 drop with lifelink that gives sorcery/instants lifelink AND you can pay to bounce the used sorcery/instant back to your hand too
Dusclops has a stony, faceless look that makes it even more unnerving in a setting such as the one shown here by illustrator James Turner
Unfortunately, being a cool creature isnt enough to be one of the best March of the Machine: Aftermath cards, but the ones below all made it
Or I'll find something else to make a more exciting madness creature with
If you activate the mana ability of Shaun & Rebecca, Agents while in the process of casting a spell, activating an ability, or during a window to activate mana abilities when you're asked to pay a cost during the resolution of a spell or ability, you won't mill cards right away