Pen

{g/u}: eat a pen
{g/w}: glue a pen onto your opponents head
{r/g}: draw a card
{r/w}: draw on a card
{u/b}: draw your own card
{u/r}: draw on your face
{w/b}: draw on your opponents face
{w/u}: draw on your food
{b/g}: draw on your hand
{b/r}: draw your own ability