Mathmech Circular

As a adcional cost to cast this spell, search your library for a creature with "Mathmech" in it's name, put it into your graveyard. If this spell was cast this way you can only declare one creature as a attacker for the rest of your turn.

Whenever a creature with "Mathmech" in it's name
is cast, you may search your library for a instant or sorcery with "mathmech" in it's name, reveal it, put it into you hand. Activate this ability once each turn.