The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." 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
Easily paired with Pocahontas - Following the Wind, also featured in Winterspell, this puts you on a one way train to locking down the board for a full turn and completely shutting off your opponent's ability to challenge
Covering both targeted removal and the abilities of planeswalkers gives you decent protection, though its a shame this was printed before Wizards introduced ward
She can quest for two lore and has Support , so when she quests, her challenge power of four is added to another character, effectively creating a powerhouse out of another character to take down big characters