Gray Fullbuster

Flash, First Strike, Haste
{2}{w}{w}{w}{w}, Transform into Demon Slayer Gray Fullbuster.
When Gray Fullbuster enters the battle tap three target creatures they don't untap until two of the controls untap steps have passed.
If Silver Fullbuster is on the battle and dies whilst Gray on the battlefield transform into Demon Slayer Gray Fullbuster for free.
"If you are looking back all the time, you will never go forward."