Auras are vulnerable enough when they cost 2 or 3 mana, let alone 5 or 6
Against: In the realm of annoying, game-ending/impacting creatures, Jin-Gitaxias still seems to fall short to some that are absent from this list
It may be Blue and White with color identity, given its Blue mana kicker, but it's not a multicolor card
Winter Sky Which do you want
This is someone being pushed to an extreme, standing their ground against an onslaught and simply saying no as emphatically as they can
White technically got its first relentless creature in Templar Knight, but Hare Apparent hit the scene shortly after and gives players a much more realistic card to build-around, with a much bigger reward