2+ Level 4 monsters
You can Tribute 1 monster; Special Summon 1 Level 4 Mathmech monster from your hand or GY. If this card is Xyz Summoned: You can detach 2 to 4 materials from this card, then activate the appropriate effect;
• 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.
You can only use each effect of Primathmech Alembertian once per turn.