Deal 1 damage to each unit.
Lifesteal while the enemy player has ten or more cards in their void, and Deadly while they have twenty or more.
Card sounds may differ from in-game as they get updated.
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.
Lifesteal - Units and spells with Lifesteal give you health when they deal damage, healing you equal to the damage dealt.