Probably a fun Izzet commander to build around, but definitely not the best in the set
If there are multiple triggers that happen at the same time, from multiple players, add the active player's triggers first, then the non active player's triggers
If the milled card fits the chosen category, you can just choose that name
The thing is, a whopping eight mana for indestructible isnt what it used to be, and we all know how receptive people arent to mass land destruction and Worldslayer wins
For The Mycosynth Gardens, it's ability is that it can turn itself into an artifact you control, which isnt something all decks - or even most decks - will want, but in the right deck is super powerful
A few years ago, no one would usually put the two together in one sentence