First: hoe enchantment (with the enchantment, plants should grow faster and produce more items like -wheat, seeds, carrots-,
The enchantment should be very rare and could only be found in very dangerous caves)
2: Arrows fall off tough blocks (when you or the dispenser shoots an arrow in a tough block like -iron block, stone, gold block,dia block...- the arrow would fall off it)
3: Arrows slowly destroy blocks if shot in them(This one is simple... if you or a dispenser shoot and block that are not tough it would break it a bit, blocks would be like -grass, glass, cobblestone...-.)
I hope you like these suggestions that are probably bad.
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