adding a effect to monsters attack (tutorial)

hello

as you see in the title i found out a way to make a monsters attack have a effect like a poison attack or it explodes when attacks well in this really simple tutorial i will show you how

step 1

make the mob that you want to have a attack

step 2

make a produce that has a potion effect or explosion nothing else.

step 3

add that produce into when player collides this mod

step 4

test it

so there will be a few problems with this like the monster giving it to a player in creative but that is all the problem is so i hope you liked this little tutorial  and goodbye