Rulda, Horde Prodder

Whenever you attack with three or more
creatures, Kobolds you control get +1/+0 and
gain menace until end of turn.
{b/r}{r/g}: Kobolds you control get +1/+0 and gain
haste until end of turn.
Sacrifice another Kobold: Return Rulda, Horde Prodder to its owner's hand.