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what creatures have this abilities and how to use it?
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Here's a list of the special abilities for pre-defined shapes:
7: Wyrmling Red Dragon [3 Dragon Breath, Fire]
9: Bebilith [5 Bebilith Web; 3 Bold, Web]
10: Mummy Lord [* Aura of Fear]
11: Ulitharid [2 Psionic Charm Monster; 1 Psionic Inertial Barrier; 3 Psionic Mass Concussion; * Psionic Mind Blast 10m Radius; * Psionic Mind Blast]
12: Beholder [* Beholder Special Attacks]
13: Adult Silver Dragon [* Aura, Dragon Fear; 3 Dragon Breath, Cold; 3 Dragon Breath, Paralysis]
14: Medusa [* Gaze, Petrification]
15: Old White Dragon [* Aura, Dragon Fear; 3 Dragon Breath, Cold]
16: Old Black Dragon [* Aura, Dragon Fear; 1 Darkness (3); 3 Dragon Breath, Acid]
17: Old Blue Dragon [* Aura, Dragon Fear; 3 Dragon Breath, Lightning]
18: Elder Water Elemental [1 Pulse, Water Elemental Drown]
19: White Slaad [* Chaos Spittle; 1 Darkness (3); 1 Summon Slaad]
20: Old Gold Dragon [* Aura, Dragon Fear; 3 Dragon Breath, Cold; 3 Dragon Breath, Weaken]
23: Elder Air Elemental [1 Pulse, Air Elemental Whirlwind]
24: Ancient Silver Dragon [* Aura, Dragon Fear; 3 Dragon Breath, Cold; 3 Dragon Breath, Paralysis]
25: Ancient Gold Dragon [* Aura, Dragon Fear; 3 Dragon Breath, Fire; 3 Dragon Breath, Weaken]
26: Black Slaad [* Chaos Spittle; 1 Darkness (3); 1 Summon Slaad]
27: Alhoon [* Aura of Fear; 1 Invisibility (3); 2 Psionic Charm Monster; 1 Psionic Inertial Barrier; 3 Psionic Concussion; * Psionic Mind Blast 10m Radius; * Psionic Mind Blast]
28: Demilich [* Aura of Fear]
30: Prismatic Dragon [* Dragon Breath, Prismatic; 1 Deflecting Force; 1 Web (3)]
The number at the beginning of the line is the Shifter level at which you get the shape. The number before the ability is the number of times you can use it per day (* = unlimited uses per day).