Even a card like Greater Good can be turned into a self-mill piece so long you have enough creatures to sacrifice and cards to discard, though it might not have been on your radar in regards to self-milling before
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Until then, may your cards do lots of cool things.
Ability copiers can turn small effects into huge plays, push value engines over the top, and even enable unexpected combos
I already have visions of this card going crazy with Underworld Breach, but it feels like it will be insane even when its played fairly
However, it's important to note that if your winning lines involve an exact card, finding it will be the difference between winning or losing the game