You can't have 4 damage be dealt to each Ancient Adamantoise, and you can't choose to take the damage yourself
Thats some serious stonks, and it could end up being a smart long-term pickup
Should the worst happen, however, there are ways to recover
High Utility, Low Price Apprentice Necromancer Archaeomancer Azami, Lady of Scrolls Go for the Throat Rakdos Charm Reality Shift Terminate Chaos Warp Crosiss Charm Curse of Verbosity Decree of Pain Clone Legion Fellwar Stone Darksteel Ingot Worn Powerstone Nevinyrrals Disk Curse of Opulence Look, I know three-mana-value rocks are out of favor (unless theyre Cursed Mirror, etc.), but if Darksteel Ingot has no place in the format, then I want no part of it
Commander is more of a social game than other formats, so you can use whatever method youd like to choose who plays first