I was thinking of a hp regen module that would regen health after every of your turn. also, taking away energy. you can only have 1 equipped. doesn't work if you have no energy or are overheated.

Health Regen 1: 2 HP, -10 energy
Health Regen 2: 3 HP, -15 energy
Health Regen 3: 5 HP, -20 energy
Health Regen 4: 7 HP, -25 energy
Health Regen 5: 10 HP, -30 energy
Health Regen 6: 13 HP, -35 energy
Health Regen 7: 17 HP, -40 energy
Health Regen 8: 21 HP, -45 energy
Super Regen: 30 HP, -60 energy
Ultra Regen: 35 HP, -65 energy