Result : Infinite opponent life loss, infinite life gain, creature ETBs, sacrifice triggers
At the current meta, AFAIK you are better off with fast disruption like hand traps, Called by the Grave, Infinite Impermanence
As far as Gonner's monster ratios go, they're relatively standard
There are a lot of things we can do to break this card, in Modern and in cEDH
Starting with the first common-rarity Elf in Magic history, Llanowar Elves, Elves have always been a top-shelf option for players looking to ramp into beefy threats and that throughline continues into modern-day Commander
Deck 1: Yosenju Deck Featuring By Order Of The Emperor With By Order of the Emperor, you can take advantage of Yosenju with on-summon effects in order to draw, which works even better to use in tandem with Kagetokage