Portal Gun

"Don't look at another man's portal gun history.
We all go to weird places. "
During every upkeep choose 1 of 3 options:
*Look at you top 3 cards in library and pull
one. Place back in same order.
*Artifact can be used as additional mana for your turn.
*Sacrifice this card for ist mana costs and
summon creature from graveyard with haste.