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Instead, there are a handful of restricted cards, which can only appear in your deck once

For example, Nail put himself to five penalties when he fought Yuga as otherwise it wouldn't mean anything if he won with nothing on the line, in the same token Asana waited for a rematch against Yuga until he got his hands on another Maximum Monster wanting a fair fight

Multiple other people proof read the stuff before it goes to the print facility

You can also team up to kill an attacker with a bigger butt by multiple blocking

This somewhat bypasses the high cost, as it will always be available to summon to the field when theres enough mana to call it