Hrm. First off, higher cost, since that 'battle' trick won't work well with a smaller creature.
Secondly...I'd think that the ability's cost is fine, actually, considering that using it on a creature with decent stats will leave it too damaged to do it again without some sort of assistance.
As for the 'bounty' trick...That's the sticky widget.
First off, the theme isn't really what
does. I mean, there's dessication now, but that's more a 'removal of water from creatures'...Directly absorbing the quanta from an enemy, a la 'plundering' them, is thematic to Pirates, I suppose, but as far as the elements go, it's more of a
trick? That's the best analogue I can think of...But if one thinks of it as some sort of 'recycling' effect, where you're reducing the opponent to the quanta it was formed or summoned from, that almost makes me think of how galaxies form, theorectically, which points a bit to
...Hrm. I'm not sure about the thematic, really.
The REAL problem, is that it's not particularly useful, unless you happen to overlap elements with your opponent...And even then, since this card's going to be a real brusier of a creature, it's probably not going to come out in the early game, when quanta generation will be vital. It could work as a mid/late-game support for a bolter I guess?
Seems to me that you might want to take the 'booty plundering' idea and make it a card in it's own right. As a creature I dunno how effective it can be unless it's made to tie into your strategy...