It's not a mana source, it's a retirement plan
I appreciate the flavour, but this is admittedly one of the many cards from Homelands that is just bad
(2018-01-19) For game purposes, your new teammate becomes the owner of the cards you give them for their library, hand, and permanents
Wizards of the Coast have decided to take a similar approach to this particular Universes Beyond set as they did with their Doctor Who release
The Expected Value of Ultimate Masters Ultimate Masters has been one of the strangest and most controversial sets we've had in recent memory, starting with the Ultimate Box Toppers being mailed to people who tried to order Mythic Edition , which lead to a ton of hype, before crashing (at least, in the eyes of a big chunk of the community) with the announcement of a huge MSRP increase from $240 to $335 a box
This is because there are several spicy new white cards with names that start with the first few letters of the alphabet