Consuming Aberration's power and toughness are each equal to the number of cards in your opponents' graveyards.
Whenever you cast a spell, each opponent reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.
* /
*
{1}{U}
Dramatic Reversal
Instant
Untap all nonland permanents you control.
{1}{U}
Drowned Secrets
Enchantment
Whenever you cast a blue spell, target player mills two cards.
{2}
Isochron Scepter
Artifact
Imprint -- When Isochron Scepter enters the battlefield, you may exile an instant card with mana value 2 or less from your hand.
{2}, {T}: You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.
{10}
Ulamog, the Ceaseless Hunger
Legendary Creature - Eldrazi
When you cast this spell, exile two target permanents.
Indestructible
Whenever Ulamog, the Ceaseless Hunger attacks, defending player exiles the top twenty cards of their library.
10 /
10
{3}{U}{B}
Umbris, Fear Manifest
Legendary Creature - Nightmare Horror
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.