Worm Charm

Worm Charm is an item you can drop without spending your turn. It will heal every Worm (friend or enemy) with 1 HP every turn. It will also increase the damage output of anyone who fires from within the Worm Charm's range. Examples:

A Scout Worm will do 40 damage with a Mine, Bruiser will do 35 damage per Shotgun shell.

A Sentry Gun within the range of the Worm Charm will do 150 damage instead of 50, which is a much bigger damage boost than the other weapons (possibly a bug).

HOWEVER if you turn it to an Unlucky Charm (can also be done with Lightning Strike), it will decrease all damage and do -1 HP to everyone within the Unlucky Charm's range. Examples:

A Scout Worm will do 30 damage with a Mine, Bruiser will do 25 damage per Shotgun shell.