After a particular bruising defeat at the hands of a Ringbearer, I've felt like Sauron when "the magnitude of his own folly [was] revealed to him in a blinding flash." But the mechanic just as often descends into incoherence
If the copied creature is copying something else, then Mockingbird enters as whatever that creature copied, with the noted exceptions
The Masamune This three-cost legendary artifact Equipment with an equip of two is next
It also benefits from free artifacts or those that generate mana like Lotus Petal and Mana Vault
However the Minion Reflector trigger still goes on the stack, and so copies the Last Known Information about the creature, and so it copies all 'copiable values'--specifically 'Other effects (including type-changing and text-changing effects), status, and counters are not copied.' Which means that if we sac each copy of March of the Machines, the Black Lotus tokens will enter the battlefield as non-creature artifacts
While these tokens are temporary, they can provide great offensive value for minimal mana inventment and can provide access to strong "enter the battlefield" triggers
