If your "Memento" monster battles, your opponent cannot activate any Spell/Trap Cards until the end of the Damage Step. If a monster(s) you control is destroyed by battle or card effect: You can target 1 of those monsters; Special Summon 1 "Memento" monster with a lower Level from your hand or GY. You can only use this effect of "Mementomictlan" once per turn. Once per turn, during your End Phase: You can target 1 "Memento" Spell/Trap in your GY; Set it.
If a face-up "Memento" monster(s) you control leaves the field because of an opponent's card: Special Summon 1 "Mementoal Tecuhtlica - Combined Creation" from your hand or Deck, ignoring its Summoning conditions. If your opponent moves a "Memento" monster(s) out of your GY, while this card is in your GY (except during the Damage Step): You can banish this card; Special Summon as many "Memento" monsters as possible with different names from your hand and/or Deck. You can only use each effect of "Mementotlan Bone Back" once per turn.
Destroy 1 "Memento" monster in your hand or face-up field, take 1 "Memento" monster from your Deck with a different name, and either add it to your hand or Special Summon it in Defense Position. During your Main Phase: You can banish this card from your GY, then target 1 "Memento" monster you control; if it attacks a Defense Position monster this turn, inflict piercing battle damage to your opponent. You can only use each effect of "Mementotlan Bone Party" once per turn.
While you control a "Memento" monster, your opponent's monsters that can attack must attack the "Memento" monster you control with the highest ATK (their choice, if tied). When your opponent activates a monster effect on the field (except during the Damage Step): You can target 1 "Mementoal Tecuhtlica - Combined Creation" you control; it loses exactly 1000 ATK/DEF, and if it does, negate that activated effect. You can only activate this effect of "Mementotlan Cranium Burst" once per Chain.
If you control a "Memento" monster: Target 1 card on the field; destroy it, then, if you control "Mementoal Tecuhtlica - Combined Creation", you can destroy 1 more card on the field. When an attack is declared involving your "Memento" monster and an opponent's monster: You can banish this card from your GY; all monsters your opponent currently controls lose 1000 ATK until the end of this turn. You can only use each effect of "Mementotlan Fracture Dance" once per turn.
During the Main Phase: Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from your hand or field as material, including a "Memento" monster. If a monster(s) in your possession was destroyed by card effect this turn, you can also shuffle "Memento" monsters from your GY into the Deck as material. During your Main Phase: You can banish this card from your GY; destroy 1 monster you control, and if you do, add 1 "Memento" Spell/Trap from your Deck to your hand. You can only use each effect of "Mementotlan Fusion" once per turn.