Thelita, Sent From Heaven

Defender, Flying, Hexproof, Indestructible.
{7}{p/w}{p/b}: Monstrosity 1 (If this creature is not monstrous, put a +1/+1 counter on it and it becomes monstrous)
When this creature becomes monstrous,
transform it.
"When she was sent to be an underworld sentry, the thoughts of betrayal flooded her emotions..."