Absorb is confusing because it's already used as an ability in Pest & Devourer. Also used in Flood. It denotes an upkeep. In the case of Pest & Devourer, the upkeep is "absorbed" from your opponent. For Flood, the Absorb is targeted at you. To top it off, Gravity also uses the quanta-absorb mechanic (tho slightly tweaked) in Black Hole.
Bear in mind, I'm not talking about the name of the card. I mean the ability itself. It'd be the same thing if you called the ability "Devour" instead. It's still being used by another creature for another mechanic. Sorry, just avoiding confusion. Otherwise the mechanic is great! New AND unique.