Your units with Stealth
cost 1 less.
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.
Stealth - When you play a Stealth unit it will be Hidden from your opponent. They won’t be able to see what is, including its stats.