Glass Cannon

When Glass Cannon enters the battlefield it deals 1 damage to any target.
{1},{t}Glass Cannon does 3 damage to target creature
Fragile(If a spell or ability an opponent controls would counter or destroy Glass Cannon, instead, that opponent creates a copy of Glass Cannon. Then, if Glass Cannon was on the stack, they may choose new targets for the copy. Exile Glass Cannon.
There are probably so many problems with this ability and the way I worded it, but I think the idea is pretty clear.