Nieri, the Aethersmith

Ward {2}, vigilance
Nieri's power and toughness are each equal to
the number of artifacts you control.

Whenever Nieri enters the battle or attacks
create a tapped Aestherspark Fragment token.
(It's an artifact with "{1}, {t}: scry 1, then
draw a card." and "{10},{t}: sacrifice this artifact
and nine other artifacts with the samename, search
your library for a card named "The Aetherspark",
put it in your hand, then shuffle.")