Gozen Match

While you control a face-up monster, you can:

• Take control of an opponent's monster with EG "Brain Control", even if it has the wrong Attribute. (If it has the wrong Attribute, it's immediately sent to the GY).
• Summon/Set monsters face-down, even if they have the wrong original Attribute.
• If you control no monsters, you can Summon multiple monsters with different Attributes at the same time. (After they're summoned, send monsters you control to the GY so that you only control 1 Attribute).

While you control a face-up monster, you cannot:

• Tribute/Ritual/Fusion/Synchro Summon a monster with the wrong Attribute, even if you would use the monsters you control as tribute/material. (EG, you can't use 2 WATERs to Synchro Summon a LIGHT).
• Flip/Normal/Special Summon a monster with the wrong Attribute.
• Summon "Lava Golem" (unless all monsters your opponent controls are FIRE).
• Summon "Uria, Lord of Searing Flames" (unless you control no monsters, or only FIREs).

If a Set Monster is attacked:

• It's not sent to the GY until After Damage Calculation.
• Its Flip Effect will activate, but it is not "destroyed by battle" (EG, Shura and Mystic Tomato will not trigger, since nothing was destroyed by battle).