You can create powerful chains with him, wherein you play an aura on Chishiro, thus creating a token, then play an aura on the token, creating another, and so on
Of course, the heroic ability is mostly just flavor text in constructed, but it did become relevant every once in a while
In dedicated builds with cards like Yawgmoth, Thran Physician and Umbral Collar Zealot, you can easily lose four creatures to transform into Sephiroth, One-Winged Angel, which adds even more to the aristocrat strategy with huge card draw, and permanent, stackable life drain emblems
Anyway, Endless Swarm is only slightly less bad than the previous two, and thats not a compliment
In MTG, card draw is defined as putting the top card of a players library into their hand