Spectral Mutation

Enchant Permanent
Spectral Mutation's abilities cost {1} more to
activate for each change counter on it.
{w}{u}{b}: Attach Spectral Mutation to target
permanent. Then, put a flying, phasing, first
strike, defender, decayed, or menace token on
enchanted permanent and a change counter on
Spectral Mutation.
{ut}: Enchanted permanent phases out.