Chu Chu

Only one type of mana can be used to play this
card, type/amount does the following:
{w} mana: Yellow Chu Chu, has Vigilance
{u} mana: Blue Chu Chu, has First Strike
{b} mana: Dark Chu Chu, has Fear
{r} mana: Red Chu Chu, has Lifelink
{g} mana: Green Chu Chu, has Double Strike
{x} mana: for every mana used to play Chu Chu,
it gains +1/1.