Whenever players use ink it is expended for that round, with all used ink being refreshed at the beginning of a players turn
All this is to say, while people with big Reserved List collections will lose some value if the foil loophole is reinstated on the Gaea's Cradles and Gilded Drakes of the world, the impact is likely overblown, as the most expensive cards on the Reserved List are expensive because they are extremely rare and collectible, not because they haven't been reprinted
Golgari Elves didnt really need any more help and Lathril is more reliably buffed in other ways but its nice that it exists, especially if you play Ashaya, Soul of the Wild and/or Yedora, Grave Gardener
Permanents phase back in during their controller's untap step, immediately before that player untaps their permanents
Our final deck is in my opinion the strongest one: Riders of Rohan packs a punch and I'm super excited to jump into this sweet Human Monarch deck!