And they aren't coming back, as they are permanently removed from the game
For six mana reads When this card leaves the battlefield, draw a card, then you may put a permanent card with mana value less than or equal to the number of lands you control from your hand onto the battlefield tapped with Warp 4 (more on Warp in a moment)
Typical sideboard cards include color-hosers, cards that are strong against a certain color or colors but fizzle when matched up against a deck without those colors
The guided capture system minimizes glare on reflective surfaces, and the AI is trained to read holo, reverse-holo, and full-art finishes detecting scratches and silvering that are easy to miss by eye
This brings up a point related to deckbuilding and is where Wizards of the Coast (WotC) just has beautiful design, because Lessons fit perfectly with magecraft too: Learn is a great way to include extra spell density without losing too much slot equity