Kog'Maw, Mouth of the Abyss

Kog'Maw costs {c} more to cast if it's a commander.
(Kog'Maw gets +1/+1 for each other colorless non artifact creature. During your upkeep look at the top
card of your library, if it's a Waste, put it on the field.)
When Kog'Maw enters or leaves the battlefeild, create
a 1/1 Eldrazi spawn with:"Sacrifice this creatures:
add a colorless to your mana pool, you gain 1 life."
Sacrifice Kog'Maw: Scry equal to its toughness.
Dies:Gain 2 life, draw a card.If Kog'Maw damages a
player, put