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 - $9.90
Lightly Played - $7.90
Moderately Played - $6.90
Heavily Played - $5.90
Damaged - $5.00
Near Mint Spanish - $9.90
Lightly Played Spanish - $7.90
Moderately Played Spanish - $6.90
Heavily Played Spanish - $5.90
Damaged Spanish - $5.00