Kallig, Xarf Alpha Male

Other Xarf creatures you control get +2/+2.
Once during the beginning of your precombat mainphase, you can sacrifice a Xarf creature. If you do, place a "Yu-Gi-Oh!"™ trap card face down on your side of the field. As long as it remains face down, you may flip it face it up and activate the card's abilities provided the situation allows according to the cards text box.
"Kinky."
-Kallig, Xarf Alpha Male