Sandman, Shifting Scoundrel Rating: 8/10 The fact that you can reanimate Flint Marko from the graveyard over and over makes it look like an incredibly dangerous threat, even if you must have a land in the graveyard for each activation
and various gameplay accessories
Im limiting this to spells that can deal damage to both players and creatures, but it has to target, so no Earthquake or Molten Disaster here, just for the sake of limiting this to something I can sift through in a limited amount of time
Greel, Mind Raker Five-mana legends that generate massive value are par for the course in Commander, with standouts like Tatyova, Benthic Druid and Endrek Sahr, Master Breeder coming to mind
This offsets that a little bit because it can come back from your graveyard, but dont underestimate how much of a pain it is that you have to keep recasting it every time