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." 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
As I started going through more options, though, I realized that "essentials" here could mean things like Dockside Extortionist, Purphoros, God of Forge
74 cards Tarkir: Dragonstorm 9 cards 2024 Welcome Decks 69 cards 20 Ways to Win 61 cards Mystery Booster 2 1342 cards Murders at Karlov Manor 40 cards Raining Cats and Dogs 58 cards Tokens 44 cards Other Cards 3353 cards It is the moment of discovery, the triumph of the mind, and the end of these results
Ahem, I mean the reverse face of the card, Sword of the Realms, can be pretty good if you're desperate for a way to protect a key creature
You want to target opponents that can go wide first
It also plays nicely with Magics many leaves the graveyard payoffs like Teval, the Balanced Scale since it consistently triggers them once each turn