Spend 7 and theyll blink three times
Limbo draughts, described in Dragon #266, are Magic Potions distilled from the waters of Lake Mosaic in the Chaotic plane of Limbo, which cause random transformations based on a general theme when drunk that last, also randomly, for a period ranging from a few minutes to most of a week
In Commander, I think Oko might win in a landslide, since the high loyalty decreases the vulnerability to being attacked by multiple opponents, and the trade ability is more likely to find a high-value target
Eight lands in play is the break-even point where you can cast this for free, though you could always run it out earlier, hope it sticks around for a turn cycle, and untap with something like 10 to 12 mana from lands alone