HBO celebrated the first day of summer by reminding us all that "Winter Is Here" on "Game of Thrones."

The network released the second trailer for Season 7 on Wednesday, giving fans a glimpse at a ton of new footage from the show's return in July.

As images of dragons flying, White Walkers and wars being waged flash through the two-minute clip, a voiceover stresses the importance of new alliances.

"For centuries our families fought together, against their common enemy, despite their differences, together," says someone who sounds like Jon Snow (Kit Harington). "We need to do the same if we're going to survive. Because the enemy is real. It’s always been real."

The trailer ends with an ominous message from Sansa (Sophie Turner) who says -- -- quoting dad Ned Stark -- "When the snow's fall and the white winds blow, the lone wolf dies, but the pack survives."

We'll take that to mean more death is coming when the show returns to HBO on July 16.

Photos See More Sneak Peek Photos from 'Game of Thrones' Season 7

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