Portent is an example of such a card from the game magic the gathering:http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=184661Another is ponder:http://gatherer.wizards.com/pages/card/Details.aspx?multiverseid=244313Preordain:http://magiccards.info/query?q=!PreordainSerum visions:http://gatherer.wizards.com/pages/card/Details.aspx?multiverseid=50145Ideas Unbound:http://magiccards.info/query?q=!Ideas+UnboundIndex:http://magiccards.info/query?q=!IndexOthers are brainstorm and impulseYet another example is spy network:http://magiccards.info/query?q=!Spy+NetworkPerhaps a cost of 2-1 time together with 'draw a card'?If you want a permanent instead of a spell then the cost might be 3-4 and ability cost 2-1. Just what I 'feel' might be right, not based on some rigid theory.