If Havi and another legendary creature you control die at the same time, Havi's last ability will trigger for each of them
Marisi being a 5/4 for four mana is a solid rate, and with a big enough board, you can connect with every opponent, goading all their creatures
Like I mentioned about leaving out Time SieveTime Sieve, I've found it's worth leaving a few wins on the table over dropping Blightsteel ColossusBlightsteel Colossus into play at the end of their turn
You can find these golden age cards in Set, Draft, and Collector Boosters, in both traditional foil and non-foil
There were no good answers to a Frenetic Efreet, only answers that worked half the time, so as long as you weren't far enough behind that he was ignorable the Efreet was always effective
Doctor Who MTG: Commander Decks Overview If you are completely new to the world of MTG then Commander is a format, or way of playing, that involves taking a deck of 100 unique cards and battling against (usually) 3 other players