Draco of the underworld

You must sacrifice X non-token creature when
you cast Draco of the underworld as and
additional cost.
Draco of the underworld enters the battlefield
with X +1/+1 counters.
{w/b}, remove any number of +1/+1 counters from permanents you control: create that many 1/1
demon creature tokens with deathtouch.
{r/g}, sacrifice any number of permanents you
control: put that many +1/+1 counters on target
creature.