"Longtime World of Warcraft leader John Hight named president at Wizards of the Coast"
Once a player has announced that they are casting Cavern-Hoard Dragon, no player may take actions to try and change the greatest number of artifacts an opponent controls before Cavern-Hoard Dragon's cost is locked in
If a card refers to "your commander," it refers to both, although if it's trying to perform an action on your commander, like put it into your hand, you choose which one it's talking about
Bad Mechanic Hosers (Nine-Ringed Bo, Tombfire, Root Cage, Trapfinder's Trick, etc) There are a number of mechanics Wizards of the Coast were clearly worried about when they printed them
Otherwise Im Captain Grumpypants and no one wants to talk to me
Historically, errata were extremely rare events reserved as a last resort to fix broken MTG cards and mechanics