Silver-Wing Sunscorcher

Flying, Protection from red.
{w}{w}: Put a charge counter on Silver-Wing Sunscorcher. As long as Silver-Wing Sunscorcher has three or more charge counters on it, it has +4/+4 and vigilance.
When Silver-Wing Sunscorcher leaves the battlefield, deal X damage to X target creatures, where X is the number of charge counters on Silver-Wing Sunscorcher.