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X TRAP If a monster you control is destroyed by your opponent's attack or card effect: Place face-up in your Field Zone, 1 Field Spell from your Deck with a different name than the cards in the Field Zones, then reveal 5 monsters from your Deck that can be Special Summoned, with different names from each other, your opponent randomly picks 1 for you to Special Summon, also shuffle the rest into your Deck

GX until its second season to establish the pattern and make it a trope

As for what those Secret Lairs will include, that remains to be seen

The only ones Im not aware of any 1999-2000 booster packs and booster packs designed to hang on display hooks, for obvious reasons