Some bring back beloved mechanics, which will impact some of Magics most popular older formats such as Modern and Commander
Even ignoring that massive oopsie, the lands are unremarkable -- notable inclusions are Game Trail, Cinder Glade, Raging Ravine, good stuff that match what the deck is going for, but nothing we haven't seen before
Yes, as long as your counterspell targets the spell that youre countering
Premodern is where goblins show up as a competitive deck, with Gruul making up around 7.5% of the current meta and Mono-Red goblins adding 1% to that number
Floriferous Vinewall
(4/17/2020) If the spell has damage divided as it was cast (like Mythos of Vadrok), the division can't be changed, although the targets receiving that damage still can