I have got a similiar idea to what the above poster thought. Poison
The juice inside cacti is poisanous,and you can cut out the juice to hold the poisan with a small tube.this does 1 damage every secend when in a arrow or sword.It stops on the 5 hit. A medium sized tube does 2 poisan damage and a big tube does 3 for.
= small tube 4
= medium size tube
= big sized tube
You can't do anything with a tube and cacti,so you must make a knife.
Now that we have done that,we can make the tube filled with poisan.
= tube(any) with poisan
  
  
= < small x 4>/ <medieum x2 or big x 1
Giving items poisan
Basicly,you just put the item and then put the poisan tube above it like so:
= Sword (any tier) and other tools including arows but not bows
= poisan tube again (any size)
= 1 arrow ( 1 so that it isn't overpowered)
Now you got a Poisan sword or anyother tool YAY!
im not good with grammar so don't mind it please XD
if tl;dr then basicly you can make poisan arrows or whatever.
Just noticed your new update, for some reason I think that the axe should have the strength of a stone axe, yeh know, for teh spikes, and also the hoe....for some reason I feel like that could be different.
Other than that, this is GORGEOUS.