Please share this suggested wording with your legal advisor.
I give to charity_legal_name, a incorp_state non-profit (Tax ID #fed_tax_id), or its successor, the sum of $___________________, for any purpose as charity_name deems appropriate.
I give to charity_legal_name, a incorp_state non-profit (Tax ID #fed_tax_id), or its successor (the real estate located at __________________ or 1000 shares of XYZ stock), for any purpose as charity_name deems appropriate.
I give to charity_legal_name, a incorp_state non-profit (Tax ID #fed_tax_id), or its successor, ________% of the rest of my estate, for any purpose as charity_name deems appropriate.