The last ability of Clive's Hideaway will allow you to cast both exiled cards without paying their mana costs (assuming you control four or more legendary creatures at that time.) In a Two-Headed Giant game, Traveling Chocobo's second ability does not affect triggered abilities of permanents your teammate controls
Land manabases for a five-color deck can get expensive quickly, so Id lean towards some of these cards to help out with fixing our colors, especially the enchantments
Not only will it contain spicy EDH reprints, but it'll have four brand-new precons as well
But once you branch out into a third color, it becomes a respectable 5/5, and it continues to scale impressively as you add a fourth or fifth color
Collectors can get anywhere in the region of $1,200 and 2,000 for this one
For this week, I'll be looking at the sixteen basic lands in the set