For two mana and a tap, you can have Saheeli make a copy of either a creature you control or an artifact
Kain is a good early play that can guarantee you the top-ups you need, and you can do some dastardly things with him, like building him tall and strapping a Vampiric Link to him to ensure you gain life off of anyone attacking with him
We have a few double strike enablers, such as Runes of the DeusRunes of the Deus, which also puts Yidris into the 2-hits club, and FireshriekerFireshrieker, which has the benefit of remaining on the field in case Yidris ever get removed
Like Im planning with the original Sylvan Library, I might just have them altered before dropping them onto a battlefield
I sure do, and it was always floating around in my control decks