Unmake the Graves, Gravedigger, Divination, and Sign in Blood would help make sure I always had cards in my hand that I could cast
There has to be something insane to be done here with Precursor Golem here
That said, if you can solve the land issue, it's possible to build a deck that can totally hold its own at a casual play level (though I'm not saying you can necessarily solve it)
That means you need to be racing and using your removal to win the race, where it will function as a big tempo swing in addition to source of card advantage, or you need a lot of removal to stop each of their attempts to generate a bit hit
Sacrifice after III.) I Gain control of up to one target artifact for as long as you control this Saga
Scrooge McDuck Resourceful Miser is a 4-cost Character with a 4|4 stat line, so it already is a good body to have on the board, and when played you can look at the top 4 cards in your deck and add an item card to your hand