Heimerdinger passive concept: Gradual Shielding
"Techmaturgical Reinforcement" Heimerdinger passively grants himself and nearby allies a stacking shield (10 HP) every second, up to a cap. This shield persists after the ally leaves Heimerdinger, and lasts until destroyed. Champions: 100-200 health Minions: 50-100 health Structures: 200-400 health H-28G Evolution turrets: 600 health. Once a turret reaches maximum shielding, it takes 30% reduced damage from AOE spells until it is destroyed.
(undecided: To make up for this high artificial HP regen, Heimerdinger has 0 base health regen)