Amass Oozes X, where X is number of creature types among creatures on the battlefield. Don't count changelings. That would be ridiculous. (To amass Oozes X, put X + 1/+ 1 counters on an Army you control. It's also an Ooze. If you don't control an Army, create a 0/0 black Ooze Army creature token first.)
Near Mint - $24.800
Lightly Played - $19.800
Moderately Played - $17.400
Heavily Played - $14.900
Damaged - $12.400
Near Mint Spanish - $24.800
Lightly Played Spanish - $19.800
Moderately Played Spanish - $17.400
Heavily Played Spanish - $14.900
Damaged Spanish - $12.400