Ambient magic has it at around 4-6 tons, after that it’s kinda like magnets- exponentially heavier the closer towards a source of mana, and even more so to magic being manifested. When Lia touched it to teleport it, it suddenly went to around 12 tons, and when she cast teleport it drew so much magic from the spell that it cut her spell distance in half and weighted around 50 tons for a moment. This can easily turn into significant amounts of damage, however the other major benefit is that this object is practically unbreakable, as it is bound together with this mass. All of this magic causes it to become more dense and stronger, so nearly no amount of force can break it, and it gives so little that it imparts all of the force, and Phil feels no blowback because he negates it. This effectively breaks physics so calculating what the tons of force and the speed he uses it isn’t really useful for determining what kind of damage he can do with it.