You take Gates over anything replacement level, never pass any of the Gates-matter cards, and just make sure you have enough removal
Whenever you learn you can either rummage (discard a card to draw another card) or put any lesson card from your sideboard into your hand
Legacy is not the reason, but the reason is related to why the card is good in Legacy
Combo decks like Azorius Omniscience are something we want to exist in Standard, but when too strong, they warp the format around them and reduce the number of viable decks
While the "it's slow and bad in a lot of matchups" argument might be reason enough to consider releasing [[Umezawa's Jitte] from Modern jail, it would at the very least show up in sideboards to punish people for playing small creatures
GET READY TO CHALLENGE: As with any Disney adventure, youre bound to run into a few obstacles, whether it's a villain, a rival, or some friendly competition