Gargantuan dragon, Challenge 21 Armor class 21, Hit Points 350 Speed 40 ft., climb 40 ft., fly 80 ft. Attacks Bite, Claw, Tail, Frightful Presence, Acid Breath, Slowing Breath, Change Shape STR 27 (+8) DEX 12 (+1) CON 25 (+7) INT 20 (+5) WIS 17 (+3) CHA 19 (+4)