There is a 30% chance to open a level 1 door and 90% chance to open a level 20 treasure chest. Requires 2 Thief Keys.
skill_name  s_unlock1 
skill_id  27 
level  1 
operate_type  A1 
magic_level  20 
effect  {i_unlock;bypc;30;0;0};{i_give_contribution;10} 
operate_cond  {op_unlock} 
mp_consume2  19 
cast_range  40 
effective_range  400 
skill_hit_time  2.5 
skill_hit_cancel_time  0.5 
reuse_delay  30 
attribute  attr_none;0 
trait  trait_none 
effect_point  1 
target_type  door_treasure 
affect_scope  single 
affect_limit  0;0 
next_action  none 
ride_state  @ride_none 
olympiad_use  1 
item_consume  [key_of_thief];2 
icon  skill0027 
Unlock Level 1 There is a 30% chance to open a level 1 door and 90% chance to open a level 20 treasure chest. Requires 2 Thief Keys. 

Unlock Level 2 There is a 50% chance to open a level 1 door and 90% chance to open a level 24 treasure chest. Requires 2 Thief Keys. 

Unlock Level 3 There is a 75% chance to open a level 1 door and 90% chance to open a level 28 treasure chest. Requires 3 Thief Keys. 

Unlock Level 4 There is a 100% chance to open a level 1 door, a 5% chance to open a level 2 door, and 90% chance to open a level 32 treasure chest. Requires 3 Thief Keys. 

Unlock Level 5 There is a 100% chance to open a level 1 door, a 30% chance to open a level 2 door, and 90% chance to open a level 36 treasure chest. Requires 4 Thief Keys. 

Unlock Level 6 There is a 100% chance to open a level 1 door, a 75% chance to open a level 2 door, and 90% chance to open a level 40 treasure chest. Requires 5 Thief Keys. 

Unlock Level 7 There is a 100% chance to open a level 2 door, a 5% chance to open a level 3 door, and 90% chance to open a level 44 treasure chest. Requires 6 Thief Keys. 

Unlock Level 8 There is a 100% chance to open a level 2 door, a 30% chance to open a level 3 door, and 90% chance to open a level 48 treasure chest. Requires 7 Thief Keys. 

Unlock Level 9 There is a 100% chance to open a level 2 door, a 75% chance to open a level 3 door, and 90% chance to open a level 52 treasure chest. Requires 8 Thief Keys. 

Unlock Level 10 There is a 100% chance to open a door below level 3, and 90% chance to open a level 56 treasure chest. Requires 10 Thief Keys. 

Unlock Level 11 There is a 100% chance to open a door below level 3, and 90% chance to open a level 60 treasure chest. Requires 11 Thief Keys. 

Unlock Level 12 There is a 100% chance to open a door below level 3, and 90% chance to open a level 64 treasure chest. Requires 13 Thief Keys. 

Unlock Level 13 There is a 100% chance to open a door below level 3, and 90% chance to open a level 68 treasure chest. Requires 15 Thief Keys. 

Unlock Level 14 There is a 100% chance to open a door below level 3, and 90% chance to open alevel 72 treasure chest. Requires 17 Thief Keys. 