Cross walks and crossed hearts and hope-to-dies.

A play on the phrase/idiom “Cross my heart and hope to die”, the idiom is usually added to a promise or a statement, to show one’s sincerity and commitment. The narrator is promising the oncoming attack is going to happen.

Sliver clouds with grey linings.

every cloud has a silver lining
(saying) every sad or difficult situation has a positive side.

So we can take the world back from a heart attack.
One maniac at a time we will take it back.
Then I’ll raise you like a phoenix wearing our vintage misery.
No, I think it looked a little better on me.

I’ve seen the world done it all, had my cake now.

have your cake and eat it( BrE) (also have your cake and eat it too NAmE, BrE )

to have the advantages of something without its disadvantages; to have both things that are available 得其利而无其弊;两者兼得
If you think that someone wants the benefits of doing two things when it is only reasonable1 to expect the benefits of doing one, you can say that they want to have their cake and eat it.
What he wants is a switch to a market economy in a way which does not reduce people’s standard of living. To many this sounds like wanting to have his cake and eat it. 他想要转型为市场经济,同时又不降低人们的生活水平。在许多人看来,这是想要鱼与熊掌兼得。

I’ve seen the world, lit it up as my stage now.

light (something) up or light up (something) : to provide light for (something) : to fill (something) with light照亮
light up a room = light a room up
照亮房间
Fireworks lit up the sky.
烟花照亮了天空。
— often used figuratively常用作比喻
A smile lights up her whole face. [=a smile makes her whole face look happy and radiant]
微笑使她神采奕奕。
Her smile lights up the room. [=she has an extremely bright and attractive smile]
她的微笑照亮了房间。

Footnotes

  1. 决定或行动公平的,合理的;If you say that a decision or action is reasonable, you mean that it is fair and sensible. ↩