INFO-JP020 メメント・スリーピィ Memento Sleepy (Mementotlan Mystical Sheep)
Level 3 EARTH Beast Effect Monster
ATK 800
DEF 1000
You can only use the (1)st, (2)nd, (3)rd effects of this card’s name each once per turn.
(1) If a monster(s) in your possession was destroyed by card effect this turn (Quick Effect): You can Special Summon this card from your hand.
(2) 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 as material.
(3) If this card is destroyed by battle or effect: You can send 1 “Memento” card from your Deck to the GY, except “Mementotlan Mystical Sheep”.

Note: This card is based on Mystical Sheep #2, known in Japan as “Sleepy”.

INFO-JP037 冥骸王－メメントラン・テクトリカ Meigaioh – Mementolan Tecuhtlica (Mementomictlan Tecuhtlica – Combined Conqueror)
Level 9 EARTH Illusion Fusion Effect Monster
ATK 3000
DEF 2000
Materials: 3 “Memento” monsters
You can only use this card name’s (1)st, (2)nd, and (3)rd effects once per turn each. You cannot activate this card name’s (1)st and (2)nd effects on the same Chain.
(1) If this card is Fusion Summoned: You can send 3 “Memento” cards from your Deck and/or Extra Deck to the GY.
(2) (Quick Effect): You can target the same number of “Memento” cards you control and cards your opponent controls; destroy them.
(3) You can banish this card from your GY; add 1 “Mementomictlan” from your Deck to your hand.

Source: X (Twitter)