b'Thunderbird \n'b'  Gargantuan   monstrosity ,  unaligned  \n'b'  Armor Class  15 (natural armor)  Hit Points  248 (16d20 + 80)  Speed  20 ft., fly 120 ft.\n'b' STATS STR: 28 (+9) DEX:  10 (+0)  CON:  20 (+5)  INT:  10 (+0)  WIS:  10 (+0)  CHA:  9 (-1)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Saving Throws   Dex  +4,  Con  +9,  Wis  +4,  Cha  +3  Damage Immunities  lightning, thunder  Skills   Perception  +4  Senses  passive Perception 14  Languages  \xe2\x80\x93  Challenge  13 (10,000 XP) \n'b' Special Traits \n'b'\n'b'  Keen Sight : The thunderbird has advantage on  Wisdom  (Perception) checks that rely on sight. \n'b'  Storm Rider . The thunderbird is continuously surrounded by stormy weather, as if it had cast  control weather , making all weather conditions within 5 miles one step more severe and all conditions within 500 feet two steps more severe. Its movement and senses are never impeded by wind, fog, rain, snow, or other weather effects. If the thunderbird is killed, these stormy weather conditions persist for 1d6 days centered on the site of its death. \n'b'\n'b' ACTIONS \n'b'\n'b'  Multiattack : The thunderbird makes two attacks: one with its beak and one with its talons. \n'b'  Beak :  Melee Weapon Attack : +13 to hit, reach 10 ft., one target.  Hit : 27 (4d8 + 9) piercing damage. \n'b'  Talons :  Melee Weapon Attack : +13 to hit, reach 5 ft., one target.  Hit : 23 (4d6 + 9) slashing damage, and the target is  grappled  (escape DC 19). Until this grapple ends, the target is  restrained , and the roc can\xe2\x80\x99t use its talons on another target. \n'b'  Thunderstrike . All of the thunderbird\xe2\x80\x99s  melee attacks  deal 7 (2d6) lightning and 7 (2d6) thunder damage in addition to their normal damage. In addition, if the thunderbird hits a creature two or more times in one round, that target must make a DC 18  Constitution  saving throw, being  stunned  for 1 round on a failed save, or  deafened  for 1 round on a success. If the thunderbird hits with all three attacks in one round, the target must make a DC 18  Dexterity  saving throw or be  blinded  for 1 round.  reactions  \n'b'  Thunderflash . When the is struck in melee with a metal weapon, the attacker takes 7 (2d6) lightning and 7 (2d6) thunder damage and must make two saving throws as the thunderbird\xe2\x80\x99s thunderstrike ability, as if struck by three attacks in the same round. \n'b'\n'b' ABOUT \n'b' This immense raptor unleashes a shrill cry as it bares its talons, each large enough to carry off a horse.'