Petrifying Knight

Cumulative Upkeep {1} (At the beginning of your upkeep, put an age counter on this creature. It then ceases to be a creature unless you pay its upkeep cost
for each age counter on it.)

Petrifying Knight emters the battlefield with -2 age counters on it.
If Petrifying Knight would be damaged and/or be destroyed, prevent that and instead put a -1/-1 counter on Petrifying Knight.
{t}: Add {c}