Umbris, Fear Manifest gets +1/+1 for each card your opponents own in exile.
Whenever Umbris or another Nightmare or Horror enters the battlefield under your control, target opponent exiles cards from the top of their library until they exile a land card.
Near Mint - $13.800
Lightly Played - $11.100
Moderately Played - $9.700
Heavily Played - $8.300
Damaged - $6.900
Near Mint Spanish - $13.800
Lightly Played Spanish - $11.100
Moderately Played Spanish - $9.700
Heavily Played Spanish - $8.300
Damaged Spanish - $6.900