Is there a bit of an enticing challenge to returning to risky mechanics like that, Affinity, or Phyrexian Mana in recent years
Not only does the end step trigger potentially draw you a card each turn, Curiosity and its many variants also work for oodles of card advantage
Siege Modification : Enchantment (Aura), casting cost of one generic and two red mana, enchanting creature or vehicle
Grenzos activated ability is cheap enough that its got a few infinite ETB/LTB combos that it can enable
Each game, its fine early on to Cycle, use Madness, and get both one card and two damage, for thats my favorite take
Thats mostly because of the mechanics that these decks focus on, which are generally a little more powerful and interesting, as well as being a bit more flexible too