Beatrice, Student of Artifice

When Beatrice, Student of Artifice enters the battlefield, create X 2/2 Colorless Construct Artifact tokens with Doll Assembly (At the beginning of your upkeep, if you control four or more Construct tokens, draw a card. For each creature card drawn this way, create a 2/2 colorless Construct artifact creature token with Doll Assembly.)

Construct creatures you control get +1/+1 for each Construct you control