Heiuter, Awoken World

When Heiuter, Awoken World enters the battlefield create a 1/1 demon creature with "If this creature would be put into your graveyard from the battlefield instead put it onto the battlefield with a +1/+1 counter on it, if this creature has no +1/+1 counters on it put one on it". And a 0/1 human token with "Whenever a non token human enters the battlefield create a 0/1
human token with this ability" .