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
Summary Disney Lorcana has revealed another card from its upcoming expansion, an alternate version of Ariel - Sonic Warrior
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
At the time of writing, this Enchanted image of Mickey Mouse in his heroic stance is shown as having a market value of $119.82 USD on TCGPlayer
You can protect them from removal, reuse an enters trigger, or sometimes both
Covering both targeted removal and the abilities of planeswalkers gives you decent protection, though its a shame this was printed before Wizards introduced ward
