Mistral Spy

Deadly - Units and spells with Deadly kill any unit they damage, regardless of health. For example, a 1/1 with Deadly can kill a 5/5 attacker.

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.

Lifesteal - Units and spells with Lifesteal give you health when they deal damage, healing you equal to the damage dealt.