Mathmech Equation

Normal Spell

Target 1 "Mathmech" monster in your GY; Special Summon it, and if you do, it gains 1000 ATK until the end of this turn. You can only activate 1 "Mathmech Equation" per turn.

Rulings – Yugipedia

Printings:

Mystic Fighters: MYFI-EN010 (Secret Rare) - 2019-11-22
Battles of Legend: Monstrous Revenge: BLMR-EN092 (Ultra Rare) - 2023-06-22

Prices:

Cardmarket: 0.15 €
TCGplayer: $ 0.16