>>96461923
Don't just think about morph creatures. Think BIGGER
>>96461945
>can't reduce the cost of morphs
I'm going to assume you mean the flip up part of morph costs here. While that's technically true, it's also not. Etrata Deadly Fugitive grants an activated ability to all your facedowns to flip up for 2UB which can be cost reduced with god ol Training Grounds or is just straight up cheaper than whatever it normally is.
As an added bonus, if you have face downs that can't normally flip up like a sorcery it lets you cast them. This also lets you cast big sorceries at instant speed if you can set it up.