Retainer of the Compleation

Deathtouch
Creatures you control have, "{p/u} {t}: Create a colorless artifact token named, 'Phyrexian oil'
with, 'At the beginning of your upkeep, if you
control twenty or more permanents with the
same name as this artifact, gain control of all
nonland permanents target player controls.'"
The oil is to it as water is to life.