The only downside is that you need Katara to keep attacking unscathed, but there are plenty of ways to grant evasion in EDH
These day, Commander decks have become the go-to place to stick some solid reprints, alongside whichever Masters/Horizons/Remastered release is that year
While building a 5-color deck can be challenging, it can be fun and strategic once you get the hang of the process
I think she's the best planeswalker in the set, how about you
It gives you a bit of a safety net against attacks if people want to draw their cards, but that's not enough of a gameplan on its own, so Doctor #2 really needs help from its companion to justify a spot in the command zone
Emet-Selch's last ability checks your graveyard at the moment it would trigger to see if you have fourteen or more cards in your graveyard