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Earthbound Immortal Chacu Challhua X DARK Level 10 [ FishEffect ] ATK 2900 DEF 2400 There can only be 1 "Earthbound Immortal" monster on the field

This typically means mana-acceleration effects that will help you produce eleven mana naturally for someone like Ulamog, the Infinite Gyre when you can't bring him to class for Show and Tell

Red-Eyes Black Dragon Of course, Red-Eyes Black Dragon has to feature in this list too

While these were incredibly sought-after upon release, they should become more widely available during reprint periods, which is when you should grab some without hesitation

Having a repeatable blink effect like this that can work at instant speed in Standard is another story