ok i can allow you to keep both effects of diebefly with some changes. Reduce the attack reduction to X100, and limit the times it can get the effect off. If it is just "Sent to the graveyard" that means your guaranteed to get the effect off whenever you put it on the field. Most cards go by when they are destroyed, but since your playing Lswarms it might be best to have it be "when this card is tributed for the summon of an Lswarm monster" which would probably make the most sense.

I will have to put up my character sheets later tonight and set up the IC.