In order to play all the 7 cards they must play 6 rounds (since <DEATH> card can be played anytime, so <LIFE> cards determine that).
If one capsule is missing every round, we'll go 6 (first round) to 5 (second round) to 4 (third round) to 3 (fourth round) to 2 (fifth round) to 1 (sixth round)...
Does this mean that all of them (minus one, guess who will be...

) are supposed to die?!