If a land you control produces multiple mana of more than one type, Vorinclex's first triggered ability adds one mana of only one of those types
And your creatures still have their abilities, so you can exile Akroma and get a 4/4 flying, haste, vigilance, pro-Red, pro-Black, trample Angel Zombie and swing, or that annoying indestructible creature you just countered, well, get a 4/4 indestructible Zombie
When you trade, you really only have the option of looking at exactly what they have, and then they need to want something that you have, and then the values of those items needs to be equal (heaven forbid it be even $2 off, otherwise no deal!)
(2007-10-01) Although this ability triggers when the Incarnation is put into a graveyard from the battlefield, it doesn't *specifically* trigger on leaving the battlefield, so it doesn't behave like other leaves-the-battlefield abilities
Editors note: On June 1, 2020, Wizards of the Coast announced a change to the companion mechanic