Iodine, the Creator of Steel

Whenever a Mech creature you control switches its power and toughness, put a +1/+1 counter on it.

{2}{w}{t} : Create a 1/6 colorless Mech artifact creature token with 'Switch-{1}{w}: This creature switches its power and toughness until end of turn.'

Whenever you create a Mech token, draw a card if you control four or more Mechs.

“With every bolt and rivet, I breathe life into steel.”