Thats right, were talking about Magic Invitational cards, and their more modern equivalent, the Player Spotlight Cards
Into The Inklands added a lot of cards from the Duck Tales series, and Scrooge got two character cards
Winter also has a delirium ability
The full texts of these abilities are "At the beginning of the monarch's end step, that player draws a card" and "Whenever a creature deals combat damage to the monarch, its controller becomes the monarch." (11/10/2020) If the triggered ability that causes the monarch to draw a card goes on the stack and a different player becomes the monarch before that ability resolves, the first player will still draw the card
Casting Serras Emissary might put a huge target on you, but it is an easy way to coax out a removal spell so you can push through an even bigger threat
Its also worth noting that the ability is worded in a way where you can even nab uncounterable spells