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While face-up on the field, this card is also WIND, WATER, FIRE, and EARTH-Attribute

If you like the look of the Boulder but want space to put tokens and dice, there is also the Ultimate Guard Boulder N Tray

ARTICLE 1996 World Champion and Shichifukujin Dragon, Rarest Trading Cards in the Guinness Book of World Records 2012

I don't know that this combination has a high top-end in terms of power or has good combo potential, but I think these two would work really well together

CORI-JP066 Sangenma Gousatsu (Destruction Chant of the Sacred Beast) Normal Trap Card You can only use the (1)st and (2)nd effect of this cards name each once per turn