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.
Overwhelm - A unit or spell with Overwhelm will deal any excess damage to your opponent on your turn (does not work while blocking).
Summon - Does something when played
Ultimate - Can only be used once.
Hunt - The enemy player will discard the specified number of cards from the top of their deck and the hunter receives +1/+1 for each non-power discarded that way. Any power discarded this way, you will draw an Advantage that gives +1 power for each.