If you dont have your playset ready, pick these up soon for Pioneer and Standard
Mechanized Production : Enchantment (Aura), casting cost of two generic and two blue mana, enchants target artifact that you control
The first tentpole Magic set based on Marvel's fan-favorite characters and epic stories will be Magic: The Gathering | Marvel's Spider-Man, which will be released globally on September 26.
3 episode of Weekly MTG hosted by Blake Rasmussen, where he was joined by Secret Lair Senior Director Lindsey Bartell and Senior Product Designer Steve Sunu
So, particularly with more experienced players, you may hear or read the term casting cost instead but now you'll know they just mean mana cost
Cost reduction effects apply to commander tax