Kaijaru, Gluttonous Scourge

{4}{t} Sacrifice a creature: If it has a power or toughness of 1 add two +1/+1 counters if it has
power or toughness of 3 or greater Kaijaru gains
X +1/+1 counters where X is equal to half sacrificed creature's power plus toughness
{0} Sacrifice a creature: Kaijaru gains that
creature's color
{2} Sacrifice a creature: Untap Kaijaru
Its hunger is ceaseless and its strength is immeasurable
but deprive it of food and it remains dormant