Vallenhell, Soul of Vengeance

When Vallenhell, Soul of Vengeance enters the battlefeild, exile it with four vengeance counters
on it and create three 1/1 Soul Shard creature
tokens with "When this creature dies, remove a vengeance counter on Vallenhell, Soul of
Vengeance."
At the beginning of your upkeep, if there are no vengeance counters on Valenhell, Soul of
Vengeance, remove it from exile.