Ice and Fire arrows

[Googi]

Fire arrows should do the same amount of damage as regular arrows, but when you are hit by them, you catch on fire and your health goes down until...

a) A few seconds passes
b) You get in water
c) Someone waters you with the watering can

Ice arrows should do no damage (or half the damage of normal arrows at the MOST) and freeze the target into a block of ice until...

a) A few seconds passes
b) Someone "hits" them with the torch"