Question
I have 4 life points and I control a Lightning Angel, equipped with Umezawa’s Jitte with no counters; my opponent attacks me with five 1/1 tokens; will I be able to block, get the counters on my Jitte and use them to gain life?
Answer
Yes. You would temporarily go to zero life points but, since you can remove the counters from your Jitte to gain life before the end of the combat phase, you will survive the attack. “A player with zero life points or less loses the game” is a condition that is checked at the end of each phase.
Это я чего-то не догоняю или дядя судья забыл про правило 104.3b:
If a player’s life total is 0 or less, he or she loses the game the next time a player would receive priority. (This is a state-based action. See rule 704.)