<span>Images of frost on roses and summer flowers on an icy crown create a chaotic mood.
Titania is explaining how her fight with Oberon is impacting the natural world. All of the seasons are mixing and changing. The mood of chaos is shown through these images of seasons conflicting--frost on flowers or flowers on ice don't usually go together. </span>
It would be an exclamative sentence
C. Double-meaning pun
In this pun, the word grave has a double meaning. It can refer to either the situation being serious or the hole in which the dead are buried. Both relate to the situation and therefore makes this a double meaning pun.
More is more would be an example of a non oxymoron