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.)
As this creature enters, it becomes your choice of a 3/3 creature with
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), a 2/5 creature with
vigilanceVigilance is a static ability that modifies the rules for the declare attackers step.
Attacking doesn’t cause creatures with vigilance to tap. (See rule 508, “Declare Attackers Step.”)
Multiple instances of vigilance on the same creature are redundant. (CR 702.20), or a 0/12 creature with
defenderDefender is a static ability.
A creature with defender can’t attack.
Multiple instances of defender on the same creature are redundant. (CR 702.3).