Mishra's Self-Replicator

The token won’t copy counters or damage marked on Mishra’s Self-Replicator, nor will it copy other effects that have changed Mishra’s Self-Replicator’s power, toughness, types, color, and so on. Normally, this means the token will simply be a Mishra’s Self-Replicator, but if any copy effects have affected that Mishra’s Self-Replicator, they’re taken into account.

The token will have Mishra’s Self-Replicator’s ability. It will also be able to create copies of itself.

Lands are never cast, so abilities that trigger “whenever you cast a historic spell” won’t trigger if you play a legendary land. They also won’t trigger if a card on the battlefield transforms into a legendary land, as the Ixalan and Rivals of Ixalan double-faced cards do.