Mo. Rev. Stat. § 456.021
A devise or other transfer, the validity of which is determinable by the law of this state, may be made by a will or other instrument of transfer, including a designation of beneficiary under a life insurance policy, to the trustee or trustees of a trust established or to be established by the testator or transferor or by the testator or transferor and some other person or persons or by some other person or persons, including a funded or unfunded life insurance trust, although the settlor thereof has reserved any or all rights of ownership of the insurance contracts, if the trust is identified in the testator's will or the instrument of transfer and its terms are set forth in a written instrument. The devise or transfer shall not be invalid because the trust is amendable or revocable, or both, or because the trust was amended after the execution of the will, the delivery of the instrument of transfer, or the death of the testator. Notwithstanding whether a devise or transfer is made before or after August 28, 1996, a devise or transfer is valid if the devise or transfer is made only to the name of the trust or if the devise or transfer is made to the name or names of the trustee or trustees as the trustee or trustees of the trust. Unless the testator's will or the instrument of transfer provides otherwise, the property so devised:
§ 456.021, RSMo