Card sounds may differ from in-game as they get updated.
Flying - Flying units can only be blocked by other flying units, but can block ground units normally. They can also be directly attacked by Killer units and Relic Weapons.
Reckless - Units with Reckless must attack.
Summon - Does something when played
Invoke - When you Invoke a card you draw your choice of a spell, unit, or attachment of its factions.
Corrupted - When a unit with Corrupted dies, a 0 strength Nightmare Shade is played. Shades have the ability to sacrifice themselves by paying their corrupted cost to play the starting unit's Summon ability. Shades lose 1 health at the end of each of your turns.