Hangarback Assembler

Start your engines! When this artifact enters, conjure a card named Hangarback Walker onto the battlefield, then put a +1/+1 counter on it. Max speed — At the beginning of your end step, put a +1/+1 counter on each artifact creature and/or Vehicle you control.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6oowldi9q1pb1hit2cn5tn.