The Tower of Heaven is an ancient structure that stretches deep into the  clouds, the heavens, and far beyond. It is composed of a material  similar to rock, but far more durable and nearly impossible to break.  Most of the structure is open-air giving a good glimpse of the clear  sky. Moss and other small plant life have grown on the outcropping on  the rock-like material with small butterflies flying about. There are  small streams and pools of water within the structure for Water attacks  and Water Pokemon. The battle will take place within one of the many  chambers of the tower.
All moves can be used within the Tower of Heaven. However, there is a  catch. Within my hands is the Book of Laws. At the end of each round,  I'll write down a new law. The laws restrict what attacks, actions, or  commands you may or may not take in battle. Violation of any law in  battle will still allow you to perform the command, however the offender  will be struck down with a lightning bolt that deals 10 damage flat and  ignores abilities, weakness, and resistance. The lightning bolt cannot  be deflected, dodged, evaded, or otherwise blocked. It will hit the  Pokemon behind a Substitute, find its way through Double Team, and will  go through Wonder Guard. Pokemon that are immune to Electric attacks by  ability or typing will still be struck down and will gain no benefit  such as Motor Drive's Speed boost. Violation of multiple laws in an  action will drop down multiple lightning bolts on the offender depending  on how many laws they've broken in a given action.
For instance, Pikachu decides to use Thunderbolt on a Staryu. If I  restrict the usage of Thunderbolt, Pikachu will be smote once for 10  damage. If I restrict the usage of Thunderbolt and all Electrical  attacks, Pikachu will be hit twice for 20 damage. Finally, if I restrict  the usage of Thunderbolt, Electrical attacks, and super-effective  moves, Pikachu will be struck thrice for 30 damage.
If there's any questions or need clarification on anything, PM me.
Summary: All moves can be used initially, however new laws added  in each round will restrict what commands can be used. Violation of any  law will be penalized with a lightning bolt dealing 10 damage flat  ignoring typing and abilities. Combatants can be penalized multiple  times in an action.
Teleportation Corollary: If this arena is picked randomly as a result of arena effect, then the ref is free to generate up to three rules for the combatants to follow until a new arena is chosen.