Each mode generates an effect worth ~2.5 mana, so youre only paying a slight, tricolor premium for the flexibility
(As this Saga enters and after your draw step, add a lore counter.) I For each opponent, up to one target noncreature artifact they control becomes a 0/4 Wall artifact creature with defender for as long as you control this Saga
Of course, there are other cards like Adaptive Automaton and Roaming Throne that are great for any typal deck, as they arent tied to one type in particular but allow you to choose the one you want to support
When it's on the battlefield, you get to attach any new equipment that enters the battlefield directly to a creature you control, eliminating the need to pay equip costs
It gives your creatures a pretty significant amount of protection but it also means a pretty strong drawback if you play equipment, auras, or any kind of buffing spells