This creature uses "Improved Toughness" from books like the Complete Warrior (giving it +4 hp instead of +3) and "Hover" from the MM.
This creature was originally the mate of the Ogre dire werebat (CR 6) also posted here. He should have a modest hoard, composed mostly of the shiny bits.
Tactically, he works best in a big cavern with room to fly. He can breathe fire on his foes early in the fight, then hover 10 feet up, out of range of melee weapons, and swing his 3d6+13 greatsword. If he gets badly hurt, he can fly for cover. Note that he would prefer to keep his lair dark, since he can see perfectly well in such conditions.
Half-Red Dragon Ogre CR 5Edit
CE Large dragon
Init -1; Senses darkvision 60 ft, low-light vision; Listen +7, Spot +7
AC 21, touch 8, flat-footed 21 (+8 natural, +5 armor, –1 size, –1 Dex)
hp 38 (4 HD)
Immune fire, sleep, paralysis
Fort +7, Ref +0, Will +1
Spd 40 ft, fly 80 ft (average); Hover
Melee greatsword +11 (3d6+13/19-20) or
2 claws +11 (1d6+9) and bite +6 (1d8+4)
Space 10 ft.; Reach 10 ft.
Base Atk +3; Grp +12
Special Actions breath weapon (DC 15)
Abilities Str +29, Dex +8, Con +17, Int +8, Wis +10, Cha +9
Feats Hover, Improved Toughness
Skills Intimidate +5 (+9 vs. Medium foes), Listen +7, Move Silently +2, Search +1, Spot +7, Survival +2
Possessions +1 chain shirt, large greatsword, oil of darkness
Breath Weapon (Su) Once a day the half-red dragon ogre can breath a 30 foot cone of fire inflicting 6d8 points of damage (Reflex save DC 15 for half).