Name that Old Testament Type!

Joe McClane, the Catholic Hack, has a regular feature on his blog where he presents New Testament fulfillments (anti-types) of Old Testament types.  Here's the current challenge:

The Game:

The New Testament Fulfillment: St. Luke 1:35 “And the angel said to her, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you; therefore the child to be born will be called holy,the Son of God.“

So tell me:

1. Name 2, yes TWO, Old Testament prototypes that the above verse was the fulfillment of.
2. You MUST state  prototypes/verses in the Old Testament that contain a type of our Lady, the Spirit, and the overshadowing, aspects of this verse in St. Luke’s, Gospel.