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 - $23,500
Lightly Played - $18,800
Moderately Played - $16,500
Heavily Played - $14,100
Damaged - $11,800
Near Mint Spanish - $23,500
Lightly Played Spanish - $18,800
Moderately Played Spanish - $16,500
Heavily Played Spanish - $14,100
Damaged Spanish - $11,800