As an archer, if you have between 1 and 2 of one arrow type, and you use it, then you can legolas shot multiple arrow types. Good for if you want to water arrow then shoot a bomb arrow directly after it. Makes water arrows slightly more useful. And for the love of Jeminy Cricket, builders! Building a 1-thick stone wall on the front lines doesn't do too much! One single bomb placed just right and it's gone! All that stone disappears! Put some back wall on those things! And overhangs! Make overhangs!