Phyrexian Scriptures (March of the Machine Commander)

Enchantment Ñ Saga - (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I Ñ Put a +1/+1 counter on up to one target creature. That creature becomes an artifact in addition to its other types.
II Ñ Destroy all nonartifact creatures.
III Ñ Exile all opponents' graveyards.