Xander9009 wrote:Awesome. More modders is always a good thing. Welcome back.

1: They work relatively well. I never have any problems with them, but others occasionally do. The AI doesn't always use them the most effectively, but it will use them. It'll also prioritize attacking them in order to kill them.
2: I don't know if it handles infect and wither both particularly effectively, but I do know that it understands it to an extent. I haven't personally played using infect often enough to really gauge it.
3: Various people have done this. The requirements are that you and the other player must have the EXACT same wad files. The CW is updated every day, so make sure you have the newest version. Make sure you're either both using or neither using Riiak's Manual Mana Mod (using it will give basic lands the manual mana ability but shouldn't have any other effect). Also make sure you both have the same deck was and content pack enablers. Also, it's only been achieved with the official game. Doesn't seem to want to work with cracked games, which is largely what stopped the multiplayer event being planned recently.
4: Riiak's Deck Builder and Notepad++ are all you really need. Notepad++ can be replaced by any programming text editor, but the deck builder is pretty much essential. You CAN mod without it, but it's a LOT easier. If you're modding for the CW, then you don't need anything else. Otherwise, you'll need Gibbed Tools to convert the images (and sort of to pack your wad, but the deck builder actually has that ability).
5: Migookman made a post recently listing all of the currently missing cards. The list includes cards that haven't been done and card's that can't be done, with no distinction, but the list is still VERY useful. It's a few pages back. (Or just search for a post by migookman and see his signature).
Feel free to make any cards you want. Older cards are probably the majority of the missing ones, so that works out.