Sick characters welcome heroic blockbusters sold to those with a mountain to climb
I believe the answer is:
icepicks
'blockbusters sold to those with a mountain to climb' is the definition.
I can't judge whether this definition defines the answer.
'sick characters welcome heroic' is the wordplay.
'characters' indicates anagramming the letters.
'welcome' indicates putting letters inside (in sense of 'inviting in').
'heroic' becomes 'epic' ('epic' can be a synonym of 'heroic').
'sick' is an anagram of 'icks'.
'icks' going around 'epic' is 'ICEPICKS'.
Can you help me to learn more?
(Another definition for icepicks that I've seen is " Freezer accoutrements".)