What does negative hp even mean?
Would a negative hp creature suck hp from surrounding creatures until it hit 0?
This may sound stupid, but what if I make the card 0/-1?
Giving it 0 hp or X hp and X infection is the closest you want to be to -X hp.
Zblader's suggest could be more balanced.
*snip*
Make the higgs particle have stats like 0|2 or 0|3 or something and when a creature is killed it is replaced by higgs particle (ie it's mass is still there). So if I kill an emerald dragon (10|6) it would subdivide into 3 higgs particles.
In other words make it a spell that kills something and then summons particles in its place.
Instant kills are not desired and without the instant kill it is an UP Alfatoxin. This is not the goal.
Yeah I don't think instant kill is good but if it was, for example, a permanent that while in play caused creatures to subdivide upon death I think that would be fine.
For example I play a firebolt on an armagio and kill it in one hit. It subdivides into 12 (or maybe 8) higgs bosons if the LHC is in play. Just an idea. I HATE instant kill trust me.
Or alternatively the LHC could be a weapon.
Weapon: Target creature loses 2 hp and a higgs boson is created on the opponent's field.
(ie chipping off a piece of a creature and turning it into some mass on the field) So it wouldn't be instant kill but it would chip off a piece of the creature and fill a creature slot with the resulting partition.