Out of all the weapons for all elements, why is it that these two weapons seems to get the short stick? Only these two weapons require different quantums to activate their effects when all others requires the same quantum as their casting cost.
I suggest to change the weapons to the following.
Pulverizer (Ground Breaker)
Type: Permanent - Weapon
Cost: 5 Earth
Effect: Weapon - Deal 5 Damage to opponent at the end of your turn. 3 Earth - Tremor: Destroy 1 Pillar in the Target Cluster (5 Earth - Destroy 2 Pillars in Target Cluster)
Trident (Poseidon)
Type: Permanent - Weapon
Cost: 3 Water
Effect: Weapon - Deals 4 Damage to opponent at the end of your turn. 2 Water - Rain: Remove all Negative Effects from Target Creature or Player. (2 Water - Rain: Remove all Negative Effects from Target Creature or Player. This effect can be used multiple times per turn.)