Trainers can be Supporters, Items, Tools or Stadiums as opposed to just Trainers, as they were back then
A 7/6 with Trample is something the opponent is forced to deal with, and thanks to the Discover 5 ability, you could easily end up with even more power on board
Both can protect from exile removal on your creatures, too, which is nice to have
While this is a solid benefit, Sigarda also has a coven ability that allows you to look at the top five cards of your library, reveal a Human, and put it into your hand as long as you control at least three creatures with different powers
One of the really cool new mechanics in this set is called adventure, explains Verhey