
That was suprisngly easy once I got past the two first forms, I did not even need to use fire heart.
But on the topic of lockerable items, I agree with darvin that it's weird that items such as the titan guitar is lockerable, but not draco's heart. Maybe it's because it would simply make it too easy to get +7hp per level if you can locker it? (+15 per level if you add alchemist's scroll). All other non-lockerable items (except from wall cruncher & Armour.exe) makes sense not being lockerable, because it would either be plain op, or not make sense outside the subdungeon.