User blog comment:RoznosicielCiast/My second attempt at balancing (hopefully better this time) + skin ideas/@comment-4846081-20140812235509/@comment-6061249-20140813032212

It's indeed a kind of gimmick, but it's a literally a "100% death under certain conditions" ability. It's not easy to unleash its full power. Unless the target is unable to move or doesn't expect it to happen at all. In this case, it's just insanely effective.

The buff to upgraded grenade... The only purpose for this one is that i literally almost never see people using it. They just want more damage because CC is something your team can provide - you don't pick Heimerdinger for crowd control effects. The grenade is just an option that works in some cases, but considering how small is its damage, it's just extremely rare to upgrade grenade rather than turret or rockets.