User blog comment:Lykrast/Double the spells/@comment-5824171-20131104144846/@comment-5824171-20131104151002

Not to mention Heimerdinger... double mini-turrets, double number of micro-rockets, and presuming the passive is doubled too, that's 60hp per 5 to everything in a 2000 radius. Including the full-sized turrets. His lane never goes down, period.

Just mull that over a minute. By level 18, our good friend Heimy gives everything in a 2000 unit radius 60 per 5 regen. that's 15 health per second, including structures. Let him into late game with this double spell thing,  and he becomes the ultimate base defender.