I also found that I wanted to play more artifact and enchantment removal in my cube to deal with these cards
The Elder Days In the elder days of yore, Legends introduced us to legendary permanents, and of course the original Elder Dragon legends inspired this format that we love
If the opponent is still stuck on Heartless Act its also very weak to big Hydroid Krasiss
I am not sorry, I am mad
There's also a reasonable number of "cast from your graveyard" mechanics at this point, including flashback, jump-start, and aftermath, so there are plenty of options available, although there aren't too many Commander staples that use a "cast from your graveyard" mechanic, so your power level might end up fairly low
By paying one generic and one red mana, you can give target artifact creature +1/+0 until the end of turn, and by paying one generic mana and sacrificing an artifact, you can make target creature unable to block this turn