# A [simulacrum][1], even [_true polymporphed_][2], gets destroyed upon subsequent casting of _simulacrum_ **tl;dr** True polymorph changes a targets form and stat block. The property of being a simulacrum is not inherent in either of these, so _true polymorph_ does not insulate nor prevent the simulacrum from being destroyed upon a subsequent casting. ## The form of the simulacrum does not affect that it is a simulacrum It's flexibility with regard to form is already established as it can duplicate any beast or humaniod. Regardless of form, it's still a simulacrum. > You shape an illusory duplicate of one beast or humanoid ## True polymorph for the creature to creature case just changes the form. > the **new form** can be any kind you choose whose challenge rating is equal to or less than the target's The target gets the statistics of the new form. > The target's game statistics, including mental ability scores, are replaced by the statistics of the new form. It retains its alignment and personality. ## Being a simulacrum isn't a [statistic][3] of the form. Being a simulacrum is specified by a magical effect not the stat block of the form it assumes. So regardless of form or stat block, it's still a simulacrum subject to the effects of the spell that created it including being destroyed upon subsequent casting. [1]: https://www.dndbeyond.com/spells/simulacrum [2]: https://www.dndbeyond.com/spells/true-polymorph [3]: https://www.dndbeyond.com/sources/basic-rules/monsters#MonsterStatistics