If a Vampire you control is dealt lethal damage at the same time as another creature, they die at the same time. That Vampire can't receive a counter from Cordial Vampire's ability in time to save it.
14-06-2019
wotc
If Cordial Vampire dies at the same time as one or more other creatures, its ability triggers for each of them.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.