Draw three cards.
One of the very few commons that is only playable as 1x in vintage (outside standard). Delve is simply too broken.
This card was underestimated by R&D.
In Modern and Legacy, many decks had many cheap cantrips filling the graveyard very fast and making Treasure Cruise basicaly and Ancestral Recall. Every blue deck started using it and other decks event splashed blue just for it.
Therefore, it got banned in both format and restricted in Vintage.
Extremely powerfull card ! Be careful before playing it as it is banned in a lot of formats !