Fire Prison (EXFO-EN052) - Extreme Force 1st Edition

All Dragon monsters on the field gain 300 DEF. If any Link Monster is on the field, neither player can Link Summon a monster with a lower Link Rating than the highest Link Rating on the field. Monsters cannot attack, except Link Monsters. Apply the following effects while 2 or more Cyberse Link Monsters are on the field.
• Negate the activated effects of Cyberse monsters.
• Cyberse monsters cannot attack, cannot be targeted for attacks, and cannot be targeted by card effects.