Ingest

Ingest is a keyword ability that triggers when a creature with ingest deals combat damage to a player. That player exiles the top card of their library.

Description
Ingest was introduced in Duel Decks: Zendikar vs. Eldrazi‎, as a preview for Battle for Zendikar‎. Ingest is linked to Ulamog's lineage.

On its own, Ingest has little impact on the game as a whole. However, Battle for Zendikar brought with it the mechanically linked creature type of Processor, Eldrazi that have abilities that use exiled cards of the opponents' as fuel. While Eldrazi-flavored interactive spells all exile, most of them are high-level picks for draft, so having small, replaceable creatures that can exile cards supports the draft archetype and mechanic. Both Processors and Ingestors are primarily blue and black.

Rulings

 * The card is exiled face up.
 * If the player has no cards in their library when the ingest ability resolves, nothing happens. That player won't lose the game (until they have to draw a card from an empty library).