soul-scar mage's -1/-1 counters aren't cancelling +1/+1 counters on dying creatures
Soul-Scar Mage placing -1/-1 counters on undying creatures with +1/+1 counters via noncombat damage is not triggering undying. The -1/-1 counters would cancel out the +1/+1 counter, so the undying creature would still return. Observed with Young Wolf being targeted by Flames of Anor with Soul-Scar Mage out.
gibbygetsit#59319
shared this idea
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Rezzahan#77802
commented
State based actions of the same check happen at the same time. This includes counters annihilating each other and creatures dying for having 0 or less toughness. So the creature goes from being on the field with both types of counters to being in the graveyard. Since dies triggers look at the game state priori to the event, see the creature as it last existed on the batlefield, they see the creature with both types of counters, and thus neither undying nor persist trigger.