Uki, Physician's Assistant

Deathtouch
Whenever you put one or more -1/-1 counters on a creature, create a 1/1 green Phyrexian Saproling creature token.
{t}: Remove a -1/-1 counter from a creature
you control, put a -1/-1 counter on another target creature.
Choose a background (You can have a Background as a second commander.)