DevoidDevoid is a characteristic-defining ability. “Devoid” means “This object is colorless.” This ability functions everywhere, even outside the game. See rule 604.3. (CR 702.114) (This card has no color.)
FlyingFlying is an evasion ability.
A creature with flying can’t be blocked except by creatures with flying and/or reach. A creature with flying can block a creature with or without flying. (See rule 509, “Declare Blockers Step,” and rule 702.17, “Reach.”)
Multiple instances of flying on the same creature are redundant. (CR 702.9)
IngestIngest is a triggered ability. “Ingest” means “Whenever this creature deals combat damage to a player, that player exiles the top card of their library.”
If a creature has multiple instances of ingest, each triggers separately. (CR 702.115) (Whenever this creature deals combat damage to a player, that player exiles the top card of their library.)