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 - $17.40
Lightly Played - $13.90
Moderately Played - $12.20
Heavily Played - $10.40
Damaged - $8.70
Near Mint Spanish - $17.40
Lightly Played Spanish - $13.90
Moderately Played Spanish - $12.20
Heavily Played Spanish - $10.40
Damaged Spanish - $8.70