The additional mode you choose can't be the same as one you're already choosing with that spell unless that spell allows you to choose the same mode more than once
For example, removing a key creature , stripping hands, and forcing awkward decisions add up quickly
Giving all your Dinosaur spells an alternate casting cost of two generic and one red lets you sneak in some early damage with a small Dinosaur, only to turn around a drop a seven or eight mana one, possibly as early as turn three
Sagas can be confusing to evaluate because they do a lot of things, but you'll find that the full package of effects can be pretty effective at advancing a certain game plan
For example, here is some card art that was generated from an LLM-sourced prompt
With a bit of extra space left, adding a Sabrina and a Red Card does not hurt to throw your opponent off balance