Oblobble Bond

Choose two target creatures, the next time one
of those creatures would die this turn, the
other gains its text box in addition to its own
and gets +X/+Y until end of turn, where X is
equal to the dead creature's power, and Y is
equal to the dead creature's toughness.

"Having a mate by your side... one that will never
leave you until death. Strange. No mate has ever
come forth to stay by my side..."