Sephiroth, Soldier 1st Class

First Strike
When this creature enters the battlefield or
attacks, create a colorless artifact token named
Materia with {1}{t}:Add {b}{w} to your mana pool.
At the beginning of your upkeep if you control
10 or more artifacts named Materia, transform
this creature.
"I will... never be a memory." - Sephiroth