  We propose a physically realizable machine which can either generate
multiparticle W-like states, or implement high fidelity $1 \to M$ ($M=1,2,...
\infty$) anti-cloning of an arbitrary qubit state, in a single step. Moreover
this universal machine acts as a catalyst in that it is unchanged after either
procedure, effectively resetting itself for its next operation. It also
possesses an inherent {\em immunity} to decoherence. Most importantly in terms
of practical multi-party quantum communication, the machine's robustness in the
presence of decoherence actually {\em increases} as the number of qubits $M$
increases.
