Prehevil, City of Termina

Prehevil, City of Termina enters tapped unless
you control a legendary creature.
{t}: Add {c}.
{2}{c}{c}: Put a madness counter on Prehevil.
When a creature dies, place a madness counter on Prehevil. This ability triggers only once each turn.
Upon reaching 6 counters, create a 1/1 Echo of
Rher creature token then reset the number of
madness counters on Prehevil.