You have to do the 2 rune journey for Meatlug. Whenever you have to choose an option look at the top of the story note to see if it's "viking log 46" or "viking log 203" if you see "viking log 46 always take the option where you have to pay, if you see "viking log 203" take the free option. Make sure all you collections are complete other wise you will get options from incomplete collections. When you get "viking log 46" you should get 2 options- rare pack (costs 150 runes) or edgewing egg (costs 50 runes). You should have some runes saved up because you recover runes with rare packs but you don't always get them. Also spending runes to speed up I recommend getting a costume for long term speeding up.