If I bring a copy of mammoth into play with the Dr Light boost, do I lose a resource? How about with Jackal's activated power (teamed up of course0.

Thanks
Scott

When Mammoth comes into play, KO a resource you control.

The card says comes into play and does not say recruit so Yes you would have to KO a resource before the jackal and Dr. Light way of playing Mammoth.

yes because it says when he comes into play rather than when recruited