In the Year of Our Lord is a translation of 'Anno Domini' and refers to the time after the birth of Christ. For instance, the first Moon landings were in 1969 A.D. or 'the year of Our Lord 1969'.
Translating English to Latin can be hard. The Latin translations for "White Death" are "Mors album" and "Album mors.". This is dependent on the period placement.
The phrase means: Would you be wise if you knew wisdom?
Iste est
latin for do more with less
The phrase 'epic world' translated to Latin as 'heroicis mundi'
in extension
Pecatis meis.
Melior
The direct translation of the word music from English to Latin is musica. This is a very common Latin phrase that is still in use.
Epicum, genitive Epicii
Semper amor.
sidus