I sit by the sea, play cards, and need a compliment, so I go...

I am the start of a compromise, hidden in view, I am the word before ring, that a lover might bring. I am the word before keeper, for someone who's true, And when pinky comes first, I'm a bond between two. What word am I?

A little of me goes a long way, breathe me in and you're likely to blow me away. I stand with a partner who's got table in its name. Where it accentuates, I change the game.

I go up when it's hot and down when it's cold, but I never move myself. What am I?

I sit on the brows of villains and kings, From Doc Brown's lab to the Steampunk rings. The Minions adore me, and Cyclops must wear My frame on his face just to harness his stare. I shield you in winter, I seal in the sea, But no everyday glasses can claim to be me. What am I?