Here are some buggy things I've noticed with Momir in play for both players.
1) if you debug Momir into play when the computer goes first before it plays a land on the first turn it will not play a land that turn. (no biggie just time it yourself).
2) When any creature goes to the graveyard from play they are removed from the game instead. Now maybe this is how it's intended but I don't see it in writing anywhere.
3) If creatures aren't supposed to be in the graveyard then creatures with Evoke aren't working cause when they are casted as a spell they go into the graveyard. (This is all the Lhurgoyfs got going for it in this format).
4) So far come into play abilities as working except for
Palinchron it doesn't trigger the untap lands. I haven't been lucky enough to get any other creature with this ability to do further testing. I have had
Palinchron come into play about 3 or 4 times and it has never triggered the untap lands.
5) Another note about
Palinchron with Momir in play. For some reason when you use it's return to your hand ability it's removed from the game instead. I haven't had any other creatures with this ability yet.
I'm guessing that we as players are not the owners of the creature cards and that's why they don't go in the players graveyard and don't go back to the players hand. But we do get to choose targets for come into play abilities which only the owner should choose if I'm not mistaken. Maybe someone knows what's going on since I've never heard of the card before Jatill released it.
[EDIT]
2 other small notes.
Werebear and
Darksteel Citadel don't have their artwork when in play but do in the deck editor and in hand. I"m guessing this is me missing some alternate art or?