Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand or GY) by shuffling 5 other "Memento" monsters with different names from your hand and/or GY into the Deck/Extra Deck. While you control no other monsters, this card can attack all monsters your opponent controls, once each. Once per turn, if your opponent activates a card or effect (except during the Damage Step): You can Special Summon 1 "Memento" monster from your hand or GY.
3 "Memento" monsters
You can banish this card from your GY; add 1 "Mementomictlan" from your Deck to your hand. You cannot activate the following effects of "Mementomictlan Tecuhtlica - Creation King" in the same Chain. If this card is Fusion Summoned: You can send 3 "Memento" cards from your Deck and/or Extra Deck to the GY. (Quick Effect): You can target an equal number of "Memento" monsters you control and cards your opponent controls; destroy them. You can only use each effect of "Mementomictlan Tecuhtlica - Creation King" once per turn.
If this card is Normal or Special Summoned: You can activate this effect; this turn, Level 9 or higher "Memento" monsters can attack directly. If this card is destroyed by card effect: You can target 1 of your other "Memento" cards that is banished or in your GY; add it to your hand. If a "Memento" monster(s) in your hand and/or face-up field is destroyed by battle or card effect, while this card is in your GY: You can Special Summon this card. You can only use each effect of "Mementotlan Akihiron" once per turn.
If this card is Normal or Special Summoned: You can add 1 "Memento" monster from your Deck to your hand, except "Mementotlan Angwitch". You can target 1 Level 2 or lower "Memento" monster in your GY; destroy 1 "Memento" monster you control, and if you do, Special Summon the targeted monster. You can only use each effect of "Mementotlan Angwitch" once per turn.
If this card is Normal or Special Summoned: You can discard 1 "Memento" card, then target 1 Spell/Trap your opponent controls; destroy it. During your Main Phase: You can destroy 1 "Memento" monster you control, and if you do, Special Summon 1 Level 3 or lower "Memento" monster from your Deck. You can only use each effect of "Mementotlan Dark Blade" once per turn.
If this card is Normal or Special Summoned: You can target 1 "Memento" card in your GY, except "Mementotlan Ghattic"; add it to your hand. If this card is sent to the GY by a "Memento" monster's effect: You can Special Summon this card. You can only use each effect of "Mementotlan Ghattic" once per turn.
During the Main Phase, if you control "Mementoal Tecuhtlica - Combined Creation" (Quick Effect): You can discard this card; for the rest of this turn, your opponent cannot target "Memento" monsters you control with card effects. During your Main Phase: You can destroy 1 "Memento" monster you control, and if you do, send up to 2 "Memento" cards with different names from each other from your Deck to the GY, except "Mementotlan Goblin". You can only use each effect of "Mementotlan Goblin" once per turn.
During your opponent's Main Phase, if you control "Mementoal Tecuhtlica - Combined Creation" (Quick Effect): You can discard this card, then target 1 face-up monster your opponent controls; take control of it until the End Phase. During your Main Phase: You can destroy 1 "Memento" monster you control, and if you do, add 1 "Memento" card from your Deck to your hand, except "Mementotlan Mace". You can only use each effect of "Mementotlan Mace" once per turn.
During the turn a monster(s) in your possession was destroyed by card effect (Quick Effect): You can Special Summon this card from your hand. If this card is Normal or Special Summoned: You can Fusion Summon 1 "Memento" Fusion Monster from your Extra Deck, using monsters from your hand or field. If this card is destroyed by battle or card effect: You can send 1 "Memento" card from your Deck to the GY, except "Mementotlan Shleepy". You can only use each effect of "Mementotlan Shleepy" once per turn.
If you do not control any face-up monsters, other than "Memento" monsters: You can Special Summon this card from your hand. During your Main Phase: You can destroy 1 "Memento" monster you control, and send any number of "Memento" monster(s) (with different names) from your Deck to the GY whose total Levels are less than or equal to the destroyed monster's original Level. You can only use each effect of "Mementotlan Tatsunootoshigo" once per turn.
2 "Memento" monsters
Any monster destroyed by battle with your "Memento" monster is banished. You can only use each of the following effects of "Mementotlan Twin Dragon" once per turn. If this card is Fusion Summoned: You can destroy 1 "Memento" monster in your hand or face-up field, and if you do, add up to 2 "Memento" monsters with different names from your Deck to your hand. If this Fusion Summoned card is destroyed: You can Special Summon 1 Level 6 or lower "Memento" monster from your GY.
If you have 3 or more "Memento" monsters with different names in your GY, you can Special Summon this card (from your hand). You can only Special Summon "Mementotlan-Horned Dragon" once per turn this way. If this card on the field is destroyed by card effect: You can target 3 face-up cards on the field, including a "Memento" card you control; destroy them. You can only use this effect of "Mementotlan-Horned Dragon" once per turn.