Enemy units can't Entomb or Revenge.
When an enemy unit dies, transform it into a +2/+2 Cudgel and draw it.
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.
Entomb - The ability of a unit with Entomb will activate when it dies. This combines well with effects that sacrifice units as a cost.
Revenge - When a card with Revenge dies, it permanently loses Revenge and gains Destiny and then it is put randomly into the top ten cards of its owner's deck.