You can create an infinite reanimation combo by stealing abilities from Blood VassalBlood Vassal, EndlingEndling and Walking BallistaWalking Ballista
If you cast Let the Galaxy Burn for X=3, the total mana value is 9, which means you could cascade into a 7- or 8-drop
If the number of cards remaining in your library is less than the amount of combat damage dealt to a player by Rampant Frogantua, you can't choose to mill that many cards with Rampant Frogantua's last ability
Im sure that will spike when the game becomes widely available over the next few weeks
For example, take the Magic booster
So, my evaluation comes from my own biases, which boil down to: play the sort of cards and decks that lets everyone at the table have a chance to breathe, play Commander, and have at least a decent chance to do the thing that their deck wants to do