Niriveh Cursecaller

When Niriveh Cursecaller enters the battlefield, up to two target Curses you control become 4/4 black Demon creatures in addition to their other types.
When Niriveh Cursecaller dies, search your library for a Curse card and attach it to target opponent or treasure if able.
"It is both a power and a curse? I think the right saying is 'It is both power and power...'"