Playing an Elesh Norn combo. After playing a second Elesh Norn on turn 2 of the Elesh saga (+1 and doublestrike) and then attacking, the creature effect failed to take place (if an opponent source deals damage opponent pays 1 or lose two life) causing a game loss. No mana up they blocked 4 tokens leaving them with 1 life before triggers should have hit them for 8. No opponent creature or artifact negating the effect when first Elesh was in play stopped the trigger earlier in game. They blocked with two 2/2 tokens and Guardian of the great door as well as Aurelia, the Law above. Aurelia’s effect of gain three life and deal 3 damage took effect as intended but also didn’t proc Elesh either.

Opponent at 2 life, five attackers, opp up to 5 life and hit me for 3 down to 7 life(Aurelia) no Elesh proc on Aurelia, opp blocked four 2/2 dblstrike, one 2/2 dblstrike goes through, no Elesh proc on blocked creatures, second hit brings them to 1 life. They attack for 8 flying and win.