Board Thread:Question and Answer/@comment-172.56.13.117-20160131114121/@comment-93.184.16.255-20160131114700

You get a raise item by completing the normal map, that gives you 90 by default. After that, you can buy the +5 item repeatedly to increase it to that point.

Not absolutely necessary if you can manage your inventory, but it'd be difficult to hold all the cards for EH eventually. I'd suggest leaving 10 spaces free for Ns at all times and only buy the item when you have less space than that