Pestilence Demons

(You may cast a Commander instant only if you
control your Commander)
Create a 1/1 black demon imp token with flying
& wither (It deals damage to creatures in the form
of -1/-1 counters.) Untill the end of the turn if
this creature dies deal 1 damage to all commanders.
Commander amplify (When this spell is cast you
may pay X life. X equals the number of commanders
on the battlefeild, if you do, copy it X times.)