That’s fine. How about this:
Spell-Like Abilities: At will - meld into stone*, minor image (DC 16), silent image (DC 15), stone shape*; 3/day - heal (DC 20), major image (DC 17), persistent image (DC 19), programmed image (DC 20), transmute metal to wood*, transmute rock to mud* (DC 19), transport via plants*. Caster level 17th. The save DCs are Charisma-based.