As an outsider looking in, MTG can seem a little prohibitive, and while theres a range of products that can be fun right out of the box, a little bit of background is often needed to engage
This practice began with Strixhavens Mystical Archive, a collection of iconic sorceries and instants sporting a gilded scroll style
When the Thought-Knot Seer hits a removal spell, not only are they less likely to get a removal spell, they cant count on it, so they dont even try to kill the Thought-Knot Seer, which means they dont even draw a card at all
See rule 702.174, Gift. 702.174a: Gift is a keyword that represents two abilities
Everything 1.9g and up needs to be cloely investigated
In exchange for entering tapped, you get a green/black land that can transform into a beefy 4/4 creature, with not-insignificant upsides, when needed