The best part is that none of these mechanics are unfamiliar to the existing playerbase at all and you have to commend the design team for their innovation
If some of the attacking creatures leave the battlefield while Mangara's triggered ability is on the stack, use the player or planeswalker they were attacking before they left to determine whether you draw a card
Captain Hook also gathers one Lore point when Questing, so, even though hes not exactly the strongest card, hes certainly not bad given that he costs just 1 Ink to get him on your side
Dragon Shield is a popular brand as they are very well-made, affordable and have a lot of cool color options, but most likely any sleeves will do
I would expect the same thing to happen for Daisy before long
Flotsam, Ursulas Spy pushes you to also run Jetsam