The first is a triggered ability: "When this permanent enters the battlefield, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle their library." (6/8/2018) Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text
If blue decks are desperate for cheap ways to spend their mana, this could get edged out by Geistwave, but it looks like a contender
If not, it's still a tutor for anything you need
There are useful roadblocks like Sea Gate Oracle that represent more of a two for one than card quality
Justiciars Portal As many players who were around the game in its early years can tell you, spells were ridiculous right off the bat
Swords to Plowshares on a creature is just amazing, especially in the color with flicker effects