"This was a lot like the Toivonen lab - but way heck more organized." - Post One, Paragraph Four - 'Heck' is in its noun form, you would need to either remove 'way' or use the verb form to have correct subject/verb agreement.
"This was his said lair, most likely." Post One, Paragraph Twelve - 'His' and 'said' are trying to do the same job in this sentence. Removing either one would fix the sentence.
"things she previously thought was just an ability thing." - Post Seven, Paragraph Three - Would need to be 'were just ability things' for subject-verb agreement.
"He was petrified of this pugly beast before him." Post Seven, Paragraph Eight - Assumed typo.
"-Do you think I care, squirt?" Post Seven, Paragraph Ten - It is not necessary to start the interrupting sentence with a hyphen; the previous hyphen is all you need. When it's the very next line, it's quite clear.
"If you want feed your families" Post Seven, Paragraph Eleven - Assumed typo.
"and cut the bandages off the role." Post Nine, Paragraph Ten - You use this again next sentence. The word you're thinking of is 'roll.'
"Flickers of a blood bathed death invaded her thoughts." Post Eleven, Paragraph Six - A hyphen is needed between 'blood' and 'bathed,' otherwise 'bathed' becomes the verb.
"the moon shining above as the silently trekked along." Post Eleven, Paragraph Twelve - Assumed typo.
"She had lived with him how many years, she viewed him as a brother rather than a cousin." Post Eleven, Paragraph Twelve - These are two independent clauses, so they need to be separated with a semi-colon. Though they are related in subject, neither modifies or depends on the other grammatically, so using a comma is misleading. Ellipses could also work.
"The fifteen year old followed her cousin well" Post Eleven, Paragraph Thirteen - Year-old always requires a hyphen, but when using the whole phrase as a noun, all three words need to be connected with hyphens, like so: fifteen-year-old.
"but the constant hugs and hand on the shoulder. The comforting words..." Post Fifteen, Paragraph Eight - First sentence is incomplete, but since it was part of a list anyways, replacing the period with a comma would make it correct, and sound the same.
"She still doubted whether or not she should of left her family" Post Fifteen, Paragraph Ten - 'Should have' is the term you were looking for.
"Here she was. Chillingly rested." Post Fifteen, Paragraph Eleven - Two incompletes that could be fixed with a comma or semi-colon.
"Yet, once it did hit her, it was harder than a lorde made of lead." Post Seventeen, Paragraph Three - Probably meant 'lode.'
"Felicity wanted out. Now." Post Seventeen, Paragraph Six - Incomplete; semi-colon recommended.
"The many dirtied, silt coated workers" Post Nineteen, Paragraph Two - Hyphen needed for 'silt-coated.'
"three shabby workers and a higher up approaching." Post Nineteen, Paragraph Five - Hyphen needed for 'higher-up.'
"Another tremer shook the entirety of the mine." Post Nineteen, Paragraph Eleven - Probably meant 'tremor.'
"A creature sown together by rock and stone." Post Nineteen, Paragraph Fourteen - Incomplete; recommend adding a verb, like 'The creature was.'
"It had a massive built" Post Nineteen, Paragraph Fourteen - Probably meant 'build.'
"Kill." - This fragment is actually not incomplete; verbs that are commands can have an implied subject, 'you.' That does make it second-person, though.
"ready for a murderstroke. The art of half-swording." - Post Twenty-One, Paragraph Three - Incomplete; semi-colon recommended.
"The soot coated redhead stepped back" Post Twenty-One, Paragraph Eight - Needs a hyphen for 'soot-coated,' or coated could be a verb.
"Red threads she only saw hints of borrowed into dirt and stone" Post Twenty-Three, Paragraph Two - Probably meant 'burrowed.'
"his raw rage and power as he completely demolished the beast." Post Twenty-Five, Paragraph Two - Rage is the subject, but there's no verb in this sentence.
"Felicity’s adrenaline widened eyes watched him." Post Twenty-Five, Paragraph Two - Need the hyphen for 'adrenaline-widened.'
"Through the hazy cloud, Felicity saw her brother figure" Post Twenty-Five, Paragraph Two - Hyphen needed for 'brother-figure.' If the second word can be used as a verb, it needs a hyphen for clarity.
"Bruised, dirtied, hurt. Yet" Post Twenty-Five, Paragraph Seven - Incomplete; semi-colon recommended.
"like he was an elephant seal. Except" Post Twenty-Seven, Paragraph Two - Incomplete; semi-colon recommended.
"That gravity golem was not the only monster being beat today." Post Twenty-Seven, Paragraph Six - It would need to be 'beaten' with being. Beat would work fine with 'getting' though.
"whom stepped into the mine." Post Twenty-Seven, Paragraph Thirteen - Should be 'who.' For reference, if you can replace it with 'he' or 'she' and the verb makes sense, then it should be 'who.' If it needs to be replaced with 'him' or 'her,' it should be 'whom.'
"whom was dusted with soot and pebbles" Post Twenty-Seven, Paragraph Nineteen - Should also be 'who.'
"whom had already begun to walk away" Post Twenty-Seven, Paragraph Twenty-Seven - Should also be 'who.'
“everything they could of ever wanted." Post Twenty-Seven, Paragraph Thirteen, and also "Eotype would of crossed his arms" a few paragraphs later. I refer you to
this article explaining why those 'of's should be 'have's.
"the larger assistant foreman smirked in confident" Post Twenty-Seven, Paragraph Nineteen - Assumed typo.
"I never like you, Eotype." - Post Twenty-Seven, Paragraph Twenty-Four - Assumed typo.
"Silence." Post Twenty-Seven, Paragraph Twenty-Six - Incomplete; adding a verb recommended.
"For a moment, he was taken back." Post Twenty-Seven, Paragraph Twenty-Seven - The phrase you're looking for is 'taken aback.' Taken back means returning.
"Dumbfounded." Post Twenty-Seven, Paragraph Twenty-Seven - Incomplete; semi-colon recommended.
"watched the teen move him a cocky smirk and cutesy wave." Post Twenty-Seven, Paragraph Thirty - Assumed typo.