Seems like the amount of damage it deals is a bit too much.
This only deals an average 5-6 or so damage a turn. I think either the damage should be increased or the chance to break lowered.
Here's a potential idea: what if, when targeted by a destroy effect, it broke instead of being destroyed? Then it may even be balanced as it is (though I still think the chance to break should be lowered, to, say, 25% for both).
I did not expect to see Brittle in Earth. IHMO Earth has a subtheme of Strength. Pulverizer is strong enough to destroy other permanents with the help of . Please explain how brittle/fragile/weak fits Earth in your opinion.
Just curious: How will it work with Skull Shield? 40%+12.5%? or the two calculations happen separately?