Well, better hope you packed an alternate win condition
The first eight cards for the day were spoiled in this Wizards of the Coast article
Entomb is a classic enabler of strategies that revolve around resurrecting cards from your graveyard, but it can also be used to set up cards with strong effects that trigger from the graveyard like Genesis, Life From the Loam, and Vengeful Pharaoh
all but two versions of the card specify that tapping Mox Pearl can be played as an interrupt too
At the beginning of combat on your turn, attach up to one target Equipment you control to target Rebel you control
Cards like Seedborn Muse and Wilderness Reclamation are excellent if you have a lot of land, lands that produce more than 1 mana, or mana dorks so you can produce more mana, even on your opponents turn