Myr Digester

Affinity for artifacts (This spell costs {1} less to
cast for each artifact you control.) It's cost can't
go below {1}.
Sacrifice a Myr, put a scrap token on Digester.
Myrs you control get a +1/+1 for each scrap
token on Digester.
Digester comes into play with {x} colorless Myr
artifact creature tokens.