In a format with an ever growing abundance of artifacts, and with it, more cards like Austere Command, Farewell and Vandalblast getting played, returning your own to hand with Retract over having them get exiled or destroyed isnt bad
Depending on what your opponents discard, you can wind up drawing more than the number of cards discarded, since Kefka draws equal to the number of card types among discarded cards
It can also be interacted with, requiring some setup to be able to cast and use, and is a card that embodies green in many ways
However, the lack of both methods to tap it and other permanents with similar payoffs, like Duskmourns survivor abilities, makes Kilo a better commander for its own deck than for this one
It finally looks like the death and taxes deck idea is getting its moment in the sun