Deadlings' Inferno

Vivid — b/r (Spend only black and red mana
on this. It's all colors of mana spent to cast it.)
Choose a color. Deadlings' Inferno deals
damage to any target equal to the number
of creatures you control and creature cards
in your graveyard of that color. If that color
is your conduit color, create a 1/1 black
skeleton creature token.