bunny kingdom card sleeves – Whiskey Rabbit See pictures for details PREMIUM HOLOGRAPHIC PHOTOCARD SLEEVES -

Mathmech Circular can special summon itself by sending any Mathmech monster from your deck to the graveyard, and if a Mathmech monster is special summoned to your side of the field while its face-up on the field, then you can add any Mathmech spell or trap card to your hand

Not at all

Credit: Wizards of the Coast Gaius van Baelsar BPhillipYork: Solid entrance sacrifice trigger, more expensive than most of them but it's modal and lets you get rid of stuff you don't want to deal with, or you can avoid having to sacrifice anything yourself

I think it's a card that can't be said to be easy to use

This card can only be Ritual Summoned with the Ritual Spell Card, "Black Magic Ritual"