The new promo card designed to support Mathmech (and some generic uses too)
VJMP-JP170 – Ultra Rare
Kaizanki d’Alembertian / Mathmech Editor d’Alembertian
Rank 4 EARTH Cyberse Xyz Effect Monster
2000/0
Xyz Materials: 2+ Level 4 monsters
You can use each effect among the (1)st and (2)nd effects with this card’s name only once per turn.
(1) If this card is Xyz Summoned: You can detach 2, 3, or 4 materials from this card, then activate the appropriate effect, depending on the number detached;
• 2: Add 1 “Mathmech” card from your Deck to your hand.
• 3: Add 1 Level 4 monster from your Deck to your hand
• 4: Add 1 Spell/Trap from your Deck to your hand.
(2) You can Tribute 1 monster; Special Summon 1 Level 4 “Mathmech” monster from your hand or GY.
And a sample video explaining how to use d’Alembertian:
